this headset is re-design of the i.tech clip r35 and has the same features, but looks more attractive with its black and silver finish on the outside. belongs to the range of i.tech stereo clip headsets, but this one unit allows you to insert your own headphones, because it has 3.5mm audio jack for customized earphone. you can control all your music tracks due to remote control feature. also you can make and receive calls, buzzer function will let you know about incoming call. just like in the clip iis and the clip iii, you can swap between quality stereo and mono sound, and perform control by a single button. bluetooth specification v1.2 class 2 supports bluetooth headset, handsfree and a2dp profiles rechargeable 230 mah li-polymer battery talk time: up to 6 hours music playing time: up to 6 hours standby time: up to 150 hours nominal charging time: within 3 hours compatible i.tech 110 ~ 240vac switching power charger dimensions (main body): 55 x 24 x 27mm weight: 20.1 grams parallel imported warranty: warranty one year delivery within 2-4 business days