HV-800 Bluetooth 4.0 Wireless Stereo Headset Universal Neckband for 2 cellphone Model: HV-800 4 Colors available: Green, Orange, Purple, Blue Bluetooth Version: 4.0 Working Time: Music/ HuaTong state 6-8 hours (The Volume will affect the time) Package Content:1 x HV/HB-800 Wireless Stereo Headset;1 x Charging Cable