2
NOTICE
All instructions, warranties and other collateral documents are
subject to change at the sole discretion of Horizon Hobby, LLC. For
up-to-date product literature, visit www.horizonhobby.com and
click on the support tab for this product.
Meaning of Special Language
The following terms are used throughout the product literature
to indicate various levels of potential harm when operating this
product:
WARNING:
Procedures, which if not properly followed, create
the probability of property damage, collateral damage, and
serious injury OR create a high probability of superficial injury.
CAUTION:
Procedures, which if not properly followed, create
the probability of physical property damage AND a possibility of
serious injury.
NOTICE:
Procedures, which if not properly followed, create
a possibility of physical property damage AND a little or no
possibility of injury.
WARNING:
Read the ENTIRE instruction manual to become
familiar with the features of the product before operating.
Failure to operate the product correctly can result in damage to the
product, personal property and cause serious injury.
This is a sophisticated hobby product. It must be operated with
caution and common sense and requires some basic mechanical
ability. Failure to operate this Product in a safe and responsible
manner could result in injury or damage to the product or other
property. This product is not intended for use by children
without direct adult supervision. Do not use with incompatible
components or alter this product in any way outside of the
instructions provided by Horizon Hobby, LLC. This manual
contains instructions for safety, operation and maintenance. It is
essential to read and follow all the instructions and warnings in
the manual, prior to assembly, setup or use, in order to operate
correctly and avoid damage or serious injury.
14+
AGE RECOMMENDATION: Not for children under
14 years. This is not a toy.
SAFETY PRECAUTIONS
Follow these safety precautions when operating this or any model drone.
• Do not touch the spinning blades or fly over people or animals.
• Keep your face and body as well as all spectators away from the rotors whenever
the battery is connected.
• Stay clear of buildings, trees and power lines. AVOID flying in or near crowded
areas. DO NOT fly close to people, children or pets.
• Maintain a safe pilot-to-drone distance while flying.
• Your Sync 251 Drone should not be considered a toy, but rather a small, working
model. If not operated correctly, the model could possibly cause injury to you or
spectators and damage to property.
• Do not alter or modify the model, as doing so may result in an unsafe or unflyable
model.
• You must check the operation of the model before every flight to ensure that the
model has remained structurally sound.
CAUTION:
Changes or modifications to this product not expressly
approved by the party responsible for compliance may void the user’s
authority to operate the equipment.
LOCATION PRECAUTIONS
The Sync
™
251 drone uses optical flow technology to hold it in place. This works by
taking repeated pictures of the ground and comparing the pixels from one picture to
the next very fast. If it senses a change, the sensor will command the drone to adjust
its position. While this technology is incredible, there are some things to watch for
that can confuse the sensor:
• Floors that are shiny and reflective may cause drifting as it tries to follow light reflections.
• Surfaces that are very consistent, like black asphalt, snow, or uniform tile floors,
can also confuse the sensor and cause drifting.
• Flying over water or anything that can move will cause the drone to drift.
• When it is windy outside and the grass or flowers are moving, the drone may drift.
If you find it is drifting where you are at, simply move to an area where the sensor
can see stationary objects.
CHARGING WARNINGS
CAUTION:
All instructions and warnings must be followed exactly.
Mishandling of Li-Po batteries can result in a fire, personal injury and/or
property damage.
• NEVER LEAVE CHARGING BATTERIES UNATTENDED.
• NEVER CHARGE BATTERIES OVERNIGHT.
• By handling, charging or using the included Li-Po battery, you assume all risks
associated with lithium batteries.
• If at any time the battery begins to balloon or swell, discontinue use immediately.
If charging or discharging, discontinue and disconnect. Continuing to use, charge
or discharge a battery that is ballooning or swelling can result in fire.
• Always store the battery at room temperature in a dry area for best results.
• Always transport or temporarily store the battery in a temperature range of
40–120º F (5–49° C).
• Do not store battery or model in a car or direct sunlight. If stored in a hot car, the
battery can be damaged or even catch fire.
• Always charge batteries away from flammable materials.
• Always inspect the battery before charging
• Always disconnect the battery after charging, and let the charger cool between
charges.
• Always constantly monitor the temperature of the battery pack while charging.
• ONLY USE A CHARGER SPECIFICALLY DESIGNED TO CHARGE LI-PO BATTERIES.
Failure to charge the battery with a compatible charger may cause a fi re
resulting in personal injury and/or property damage.
• Never discharge Li-Po cells to below 3V under load.
• Never cover warning labels with hook and loop strips.
• Never charge batteries outside recommended levels.
• Never charge damaged batteries.
• Never attempt to dismantle or alter the charger.
• Never allow minors to charge battery packs.
• Never charge batteries in extremely hot or cold places (recommended between
40–120° F or (5–49° C) or place in direct sunlight.
