1, Work voltage :3.6-4 .2 V 2, Work current: <30mA (Bluetooth module) 3, Work current: <400mA (power amplifier, Bluetooth ) 4, Standby current: <3mA 5, Scope: <10 meters of wireless communication (consistent with the Bluetooth protocol specifications CLASS 2) 6, Transmit power: Class2   less than 4dbm, low radiation. 7, Spread spectrum: Frequency Hopping Spread Spectrum 8, Bluetooth version: compatible with V2.1, V2.0, V1.1 and V1.2 standard. 9, Bluetooth protocol support: A2DP, AVRCP 10, Frequency range :2.401-2 .480 GHz (2.4GHz ISM Segment) 11,The receiver sensitivity: <-90dBm, BER <0.1% 12, SNR: 95dB 13, Distortion: <0.2%  14, Frequency Response: 20HZ-20kHZ 15, Operating temperature: -10 ~ 55 16, Coincide with IEEE 802.11