This is the best quality Headset ( two wire head set ) with Push-To-Talk switch. PTT button and Microphone are together with clothing clip. The second wire goes up to acoustic coil tube with ear tip for covert direct communications and no adaptor required. You don't need to worry about head or ear size.  Just plug it into your cellphone or home/business cordless phones for convenient hands-free talk! Satisfaction Guaranteed.

Compatible with : Nextel Falcon i205, i215, i265, i275, i285, i305, i315, i325, i335, i355, i365, i415, i450, i465, i530, i560, i570, i576, i580, i605, i615, i670, i680, i710, i720, i730, i733, i736, i740, i760, i776, i830, i833, i835 Roxy, i836, i850, i855, i860 Woody/Tattoo, i870, i875, i880, i890, i920, i930, ic402, ic502, ic602, ic902 phones.