damage, short circuit and warranty failure.
2) Disassembling your earphone may damage the earphone and
would be beyond our service warranty.
3) Do not use your earphone in a dusty environment.
4) Please use a clean, soft and dry cloth to clean your earphone.
5) Keep placing the earphone in its original package when not using
it.
6) Do not let your children play with the earphone. They may hurt
themselves or damage the earphone.
7) Do not place the earphone in hot or cold environment, otherwise
it may be temporarily unusable.
Summary of Contents for D312U
Page 1: ...Telephone Headset D312U...
Page 5: ...3 Connection...
Page 7: ...Step 2 Input Audio in Windows Settings and then choose Manage audio devices...
Page 8: ...Step 3 In sound options choose D312U in the list of Playback and Recording D312U...
Page 10: ...Step 2 Select Sound from the list...
Page 11: ...Step 3 In sound options choose USB Audio Device in the list of output and input...
