FeaturesWorks well with TV， DVD MP3 player and other audio devices Can work with two Bluetooth enabled devices at the same timeEasy to operation， connect and playGreat for ultra-long transmission distanceCompact size for ease of carrying Built-in lithium battery can continuously work for over 24 hours General SpecsBrand & Model TS-BT35F08Bluetooth Profile A2DP HSP HFP OPP OBEX DUNBluetooth Version v3.0Frequency Range 2.4GHZ-2.4835GHZDistance 8 m ~15 m Barrier-free: 20 mStandby Time About 720 h Charging Time 1 hCharge Current 150 MABattery Capacity 160 MAWorking Voltage 3.3~4.2 VWorking Time 5~6 hWorking Current 30 MADimensions 55 X 25 X10 mmWeight 25 gPackage DetailsWeight: 41.73 g Size: 11*7.5*2.2 cm