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       Thank you for purchasing this product  from  HOLOSUN , the 
TUBE  HS406A1 is a  monocular  red  dot  sight. Please read the 
User's Manual carefully before operation.

Features

Important notices

Battery

Installation

1. 

Covert aiming:

 When aiming, the red dot is projected within the 

     sight so no light can be detected by the target. Unlike a laser sight 
     that appears as a dot that can be seen on and by the target.
2.

 Full field of view for target acquisition

: The user can gain rapid 

     target acquisition and situational awareness while aiming with 
     both eyes open.
3.

 Low power consumption:

 Only a few micro-amperes of current 

     are required for sight operation. Sight runs on one battery for up 
     to 30,000 hours. When battery replacement is required, the 
     battery compartment access through the battery tray.
4.

 Motion power on:

 The sensitive motion sensor will turn the power 

     on with any motion detection.
5.

 Parallax free optical system:

 Parallax is   

≤±

 

1MOA.

    

1.  Ensure that the firearm is completely unloaded  and safe  
     before device installation, sighting in, installing a new   
     battery, or any other adjustment.  
2. Always ensure that the muzzle of the firearm is pointed in a 
    safe direction when replacing the battery.
3. Please keep the packaging should you need to make a   
     warranty claim.

Fig2-2

1. The mounting bracket (Fig 3) is for attaching the sight to the 
    weapon.  The sight comes with mounting bracket attached.
2. Attaching bracket to the sight: 
    1) Remove the 6 screws with the hex wrench and remove
        the upper cover.
    2) Mount the sight on the bracket and follow the orientation 
         and position which are  shown in Fig 4.
    3) Attach the upper cover and evenly tighten the 6 screws.
         Use thread locker if available.
3. Mounting the bracket to the weapon:
    1) The mounting bracket is adaptable to any firearm with a
         Picatinny Rail. If the firearm has no Picatinny rail , or 

Fig 3   

Mount  bracket

Upper cover

Screw

Clamp 

socket

Cross bolt

Red Dot Sight

   
  www.holosun.com

HS406A1

TUBE

User's  Manual

7.

 Brightness adjustment:

 There are 12 settings(10 D2NV) 

     for the reticle as to match the ambient lighting conditions
8. 

Memory function:

 The sight will remember the last saved

     brightness setting when powered on and off.
9. 

Two top mounted buttons:

 The top mounted buttons allow 

     for easy operation without obstructing the user's vision.
10. 

Mounting bracket:

 Compatible with Picatinny rail.

11.

 Waterproof:

 IP67

 

6.

 Sleep time delay:

 The sight will be automatically entered into

     sleep mode after not being used for 8 hours.

LAYOUT

Fig1

Brightness 

  button

reduce

TUBE   HS406A1 

Protective cap

Brightness 

 button

increase

Battery compartment

Battery compartment

 Battery 

Screw 2

Screw 1

Slot

Screw 1

Screw 2

Battery 

compart-

ment

O-ring

Battery compartment

 Battery 

Screw 2

Screw 1

O-ring

Fig2-1

1.  The operating voltage for this device is  DC3V using one 
      high quality CR2032 Lithium battery included with 
      purchase.
2. The high quality battery  can power the device for up to
     30,000 hours. Caution: The battery is not rechargeable.
3. Battery replacement

:

    1) Removing the battery  (Fig  2-1): 

 
        a) Loosen screws 1, 2.
        b) Insert coin or similar 
             object in the battery 
             tray slot, pry out the 
             battery tray, and 
             remove the discharged
             battery by lifting it up. 
             A tool is provided.
        2) Battery installation (Fig2-2):

     a) Insert the battery into 
          the battery tray by 
          pushing it down with 
          the correctly marked 
          polarities, "+" and "-"

.

      b) Insert and press the 
           tray into the battery 
           compartment.

   

      c) Tighten screws 1, 2.

Caution:  

 

The loss or damage of O-ring will 
cause  water leaking into the battery
compartment and may damage 
electronic circuits and the device.

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