Transducer：43x47 mm/1.5" Frequency response range：110Hz- 20kHz Signal to noise ratio：>85dB Output Power：4.2 W RMS Bluetooth version：5.1 Bluetooth transmission power：≤8dBm(EIRP) Bluetooth transmission modulation：GFSK, π/4 DQPSK, 8DPSK Bluetooth frequency：2.400 GHz- 2.4835 GHz Bluetooth specification：A2DP 1.3, AVRCP 1.6 type of battery：Lithium-ion polymer battery (2.7Wh) Charging time：2.5 hours Music playing time：Up to 5 hours (depending on volume and audio content) Dimensions (width x height x thickness)：87.5×75×41.3 mm Weight：209g
