Feature: 1,Compatible with Bluetooth V1.1/1.2 2,Frequency range:2.4 GHZ 3, Data rate:721 kbps2. 4,Battery : rechargeable 5,Excellent of the earhook.wear left or light ear softly 6, Standby time: 100hours 7,Talking time: 6 hours Dimenstion:49x36x38.5mm QTY:28PCS G.W/N.W: 9KG/7KG Packing:Blister packing Price: ?05.00