Bluetooth Audio Receiver with 3.5mm and 2 RCA Adapter Bluetooth 5.0 Up to 8 Hours Playing Time Easy to UseBluetooth Version:5.0 Output: Female R/L audio and 3.5mm audio Bluetooth Protocol: AVRCP/A2DP Frequency range:2.402GHz-2.480GHz Frequency Response: 20Hz-20kHz Output Power: 28mW, RL=16Ω SNR(Signal to Noise Ratio):>90dB THD ( total harmonic distortion ):<0.1% Transmit Range: Up to 10m/33ft Battery Capacity: 3.7V/200mAh Operating Time: up to 8 hours Micro USB Port for power supply(5V) Micro USB Cable / 3.5MM M/M audio Cable included Approximate Charging Time: 2.5 hours Dimension: L67xW67xH24 (mm) with SRRC/BQB Certificate