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Tips:  

1. There is high-efficient lithium battery inside the headset. To extend the battery life, first 

charging shall not less than 3 hours. If it is not used for a long time, please make sure that 
there is enough power left in the battery. 

2. You’d better listen to the music at the suitable volume so as to prevent causing the 

detrimental effect to the hearing. 

3. Do not use this product in the environment of exposed liquid, dampness or excessive 

moisture. 

4.  If the temperature has surpassed the range from 0°C to 4°C, do not operate this product. (If 

in the environment exceeding specified temperature range, please turn off the device and 
continue to operate it when the temperature returns to the specified working temperature.) 

 

 

Product Support 

Need more technical support? Please go to: http://support.a4tech.com/ and our support team 
will respond within 72 hours. 
 
 

Notice: 
The headset charging cable is available for charging use only, do not play music at the 
same time charging. 

 
To prevent possible hearing damage,do not listen at high 
volume levels for long periods.

 

 

 

 

 
**** All Pictures & Description Mentioned above is for Reference Only, and are Subjected to the 
Actual Product. 

Summary of Contents for RH-300

Page 1: ...User Guide Model RH 300 Wireless 2 4G HD Headset www a4tech com ...

Page 2: ... television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient of relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the ...

Page 3: ...3 Package Contents USB Charging Cable Nokia USB extension cable Wireless 2 4G HD Headset Nano receiver RH 10 ...

Page 4: ... switch the power indicator lights up the connection is successful and the headset is ready for use Shut down Vertically short press power switch the power indicator goes out and the headset turns off Note If the connection fails for a certain time the headset powers off automatically Volume Turn the knob up to increase the volume or keep turning up to continuously increase Volume Turn the knob do...

Page 5: ... range room or there is strong wireless conflicts nearby adopting the receiver with a USB extension cable to keep it away from the computer or any interfering sources 2 If the audio attribute doesn t switch automatically please open Hardware and Sound from Control Panel select Sound and then press OK after selecting A4tech Wireless Headset RH 10 in the default device field ...

Page 6: ...orks 2 If connecting to the original receiver continue to pair codes according to the above steps How to charge 1 Insert one end of the charging cable into a device with USB port such as computer and common 5V USB adapter and insert the other end into the charging port on the headset 2 The Nokia cellphone charger can also be used for charging 3 The charging LED lights red when the headset is charg...

Page 7: ...D on the headset lights up Short receiving range 1 2 4G wireless headset and receiver may interfere or be interfered by the wireless devices at the same frequency including household wireless network device microwave oven Bluetooth radio telephone and so on Therefore please keep away from the devices mentioned above 2 Using an USB extension cable can reduce the interference as much as possible Rem...

Page 8: ...surpassed the range from 0 C to 4 C do not operate this product If in the environment exceeding specified temperature range please turn off the device and continue to operate it when the temperature returns to the specified working temperature Product Support Need more technical support Please go to http support a4tech com and our support team will respond within 72 hours Notice The headset chargi...

Page 9: ...9 ...

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