Functionality:
Before using the headset to talk via the telephone, one has to ‘introduce’ the two devices to each other. That is done by a standard pairing procedure. In order to switch the set to this mode, one has to hold the power button for 8 to 10 seconds while the set is not operating. Success in doing so will be signaled by flashing red-green-red-green of the diode. Having finished the above procedure, the user has to search the device from telephone and to pair both sets, entering the standard 0000 code.

HBH-435 supports the AutoPairing technology, so in case your telephone also supports it (as in most of the recent Sony Ericsson models), it will be asked whether to connect after the headset has been switched to the above mode. Thus one can avoid the need to search and enter codes.

Working with the device is standard and its options do not exceed the regular ones. Operations are carried out mainly thru the only convenient button – the call key. A simple push answers an incoming call when the phone is ringing or terminates an active conversation. In order to reject a call one must press the same button for 2 seconds. Pressing it once in stand-by mode will start the voice commands and two fast clicks - dial the last number. There is one rare option – a master reset. It can be carried out by simultaneously holding the power and call keys for about 8 seconds.

Performance:
The headset left us with mixed feelings regarding its merits during conversation. An unpleasant effect that is instantly noted is the sharp and grating ‘chainsaw’ sound on the other side when answering thru the headset. Your voice is heard clearly and nicely, but the bad news is – very weakly. The sound in your ear is comparatively normal and clear, but once again – not very strong, which may cause trouble in a noisy environment.
The DSP system is strongly effective against wind noise interference – it filters well even at strong wind and you can talk intelligibly and trouble-free. However it is not equally good at sounds like music and you will have difficulty if it is louder.