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How to use

Connect the AC adaptor.

Charge the headphones.

Connect the A/V component, following hookup 

 or 

 below.

 Using the headphone jack of the A/V component

Headphone jack 
(Stereo mini jack)

TV, Digital music player, etc.

L (white)

R (red)

Plug adaptor (Stereo mini jack ×1 

 Pin plug ×2, not supplied)

Audio out  
(L/R) jacks

Stereo system, Blu-ray Disc player, DVD player, TV*, etc.

*  In case of no headphone jack.

If the sound is distorted by connecting the transmitter to the A/V component’s 
audio out (L/R) jacks, reconnect the transmitter to the headphone jack.

Start playback of the A/V component.

Wear the headphones.

Before listening

Be sure to lower the volume of the headphones after the 

/

 (On/Standby) 

indicator lights up, to reduce the risk of hearing damage.

Tactile dot

Hold down until 
indicator lights up.

Checking the included 
items

Transmitter TMR-HW300 (1)

Headphones MDR-HW300 (1)

AC adaptor (1)

Micro-USB cable (approx. 50 cm) (1)

Connecting cable (approx. 1.5 m) (1)

Features

Thank you for purchasing the Sony MDR-HW300K Wireless 
Stereo Headphone System. Before operating the unit, 
please read this manual thoroughly and retain it for future 
reference.
Some features are:

ˋ

ˋ

High quality sound with uncompressed digital 
wireless transmission

 

2.4 GHz digital wireless transmission prevents 
interference of obstacles. High quality sound with 
uncompressed digital wireless transmission.

ˋ

ˋ

Powerful and expressive sound

 

Powerful and expressive sound with 40 mm 
neodymium driver unit.

ˋ

ˋ

Comfortable fit even for a long period of time

 

Comfortable fit for long period of time with soft 
earpads and head cushion.

ˋ

ˋ

Real-time automatic channel selection prevents 
sound break up

 

Real-time automatic channel selection on headphone 
system for best reception of signal. This system can 
switch to a free channel automatically without any 
sound interruption before the signal is blocked.

ˋ

ˋ

Volume control function on headphones

ˋ

ˋ

Easy charging with USB port

 

3 hours to fully charge the battery, and approx. 10 hours 
playback time. Can be used while charging the 
headphones.

ˋ

ˋ

Wired design option

 

Also works wired design headphones with supplied 
connecting cable. You can enjoy content on a 
smartphone, PC and tablet with this wired option.

ˋ

ˋ

Swivel design for easy storage

Adjust the volume.

The headphones will beep when the volume reaches 
maximum or minimum.

Tactile dot

After use

Stop playback of the A/V 
component.

Hold down the 

/

 (On/Standby) 

button of the headphones until the 

/

 indicator turns off.

Tip

The headphones will turn off 
automatically if RF signal transmission 
from the transmitter stops for about 5 
minutes.

If no signal or low signal is input for 
about 10 minutes

If the transmitter detects no signal, the POWER indicator of the 
transmitter blinks for about 10 minutes, then the transmitter stops 
the RF signal transmission automatically*. The transmitter restarts 
after receiving an audio signal again.
The transmitter may also stop if the volume of the connected A/V 
component is too low. In this case, raise the volume of the 
connected A/V component within the range where the sound is 
not distorted, then lower the volume of the headphones.

*  If signal noise is output from the connected A/V component, the 

transmitter may not turn off, even when no audio signal is input.

English

Wireless Stereo Headphone System

WARNING

To reduce the risk of fire or electric shock, do not 
expose this apparatus to rain or moisture.

To reduce the risk of fire or electric shock, do not expose 
this apparatus to dripping or splashing, and do not place 
objects filled with liquids, such as vases, on the apparatus.

Do not expose the batteries (battery pack or batteries 
installed) to excessive heat such as sunshine, fire or the 
like for a long time.

To avoid electrical shock, do not open the cabinet. Refer 
servicing to qualified personnel only.

Do not install the appliance in a confined space, such as a 
bookcase or built-in cabinet.

As the main plug of AC power adaptor is used to 
disconnect the AC power adaptor from the mains, connect 
it to an easily accessible AC outlet. Should you notice an 
abnormality in it, disconnect it from the AC outlet 
immediately.

The unit is not disconnected from the mains as long as it 
is connected to the AC outlet, even if the unit itself has 
been turned off.

Excessive sound pressure from earphones and 
headphones can cause hearing loss.

The nameplate is located on the bottom of the transmitter.

Hereby, Sony Corp., declares that this equipment is in 
compliance with the essential requirements and other 
relevant provisions of Directive 1999/5/EC. 
For details, please access the following URL : 
http://www.compliance.sony.de/

The validity of the CE marking is restricted to only those 
countries where it is legally enforced, mainly in the 
countries EEA (European Economic Area).

Disposal of Old Electrical & Electronic 
Equipment (Applicable in the European 
Union and other European countries with 
separate collection systems)

This symbol on the product or on its 
packaging indicates that this product shall 

not be treated as household waste. Instead it shall be 
handed over to the applicable collection point for the 
recycling of electrical and electronic equipment. By 
ensuring this product is disposed of correctly, you will help 
prevent potential negative consequences for the 
environment and human health, which could otherwise be 
caused by inappropriate waste handling of this product. 

The recycling of materials will help to conserve natural 
resources. For more detailed information about recycling 
of this product, please contact your local Civic Office, your 
household waste disposal service or the shop where you 
purchased the product.

Disposal of waste batteries (applicable 
in the European Union and other 
European countries with separate 
collection systems)

This symbol on the battery or on the 

packaging indicates that the battery provided with this 
product shall not be treated as household waste.
On certain batteries this symbol might be used in 
combination with a chemical symbol. The chemical 
symbols for mercury (Hg) or lead (Pb) are added if the 
battery contains more than 0.0005% mercury or 0.004% 
lead.
By ensuring these batteries are disposed of correctly, you 
will help prevent potentially negative consequences for 
the environment and human health which could 
otherwise be caused by inappropriate waste handling of 
the battery. The recycling of the materials will help to 
conserve natural resources.

In case of products that for safety, performance or data 
integrity reasons require a permanent connection with an 
incorporated battery, this battery should be replaced by 
qualified service staff only.
To ensure that the battery will be treated properly, hand 
over the product at end-of-life to the applicable collection 
point for the recycling of electrical and electronic 
equipment.

For all other batteries, please view the section on how to 
remove the battery from the product safely. Hand the 
battery over to the applicable collection point for the 
recycling of waste batteries.

For more detailed information about recycling of this 
product or battery, please contact your local Civic Office, 
your household waste disposal service or the shop where 
you purchased the product.

Notice for customers: the following information is only 
applicable to equipment sold in countries applying EU 
directives

This product has been manufactured by or on behalf of 
Sony Corporation, 1-7-1 Konan Minato-ku Tokyo, 108-0075 
Japan. Inquiries related to product compliance based on 
European Union legislation shall be addressed to the 
authorized representative, Sony Deutschland GmbH, 
Hedelfinger Strasse 61, 70327 Stuttgart, Germany. For any 
service or guarantee matters, please refer to the 
addresses provided in the separate service or guarantee 
documents.

(Red)

(Off)

Complete when indicator 
turns off.

To AC 
outlet

Using the unit by connecting the supplied cable

You can use the unit as ordinary wired headphones by connecting the supplied connecting cable. You can also 
charge the headphones during wired use. Be sure to use the supplied connecting cable.
To reduce the risk of hearing damage, lower the volume of the A/V component before connection.

Supplied connecting cable

Storing the headphones

Check right and left of the headphones before swiveling to store.

 Using the audio out (L/R) jacks of the A/V component

Use a plug adaptor (not supplied) between the transmitter and the A/V component.

Wireless Stereo 

Headphone System

Operating Instructions

4-478-288-

11

(1)

MDR-HW300K

 

©2013 Sony Corporation  Printed in China

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