Bluetooth Chipset/Version: CSR8635 V 4.0
Built in Li-Battery: 400Mah/3.7V
Working Distance: 10M
Playing time: 15hours
Channel: Stereo
Speaker Unit: Φ40mm
Active cancellation: 18-20dB
Frequency range: 2.402-2.480GHZ
RF performance: Reception sensitivity:-90dBm, maximum transmit power 4dBm
Sound frequency: 20Hz-20KHz,95Db. Total harmonic distortion(THD)0.1%
Bluetooth protocol: Supports a2dp/avctp/hfp/spp/smp/att/gap/gatt/rfcomm/sdp/l2cap