Bluetooth version: v5.0 Support for A2DP decoding Receiving distance: less than 10 meters Working frequency: 2.402GH2-2 480GHz Transmitting power: level 2, maximum 4dBm Supporting simple pairing Audio decoding mode: SBC Signal to Noise Ratio (SNR): > 75dB Distortion: <1% Voltage DC5+0.25V Battery capacity; 3.7V/45MAh Working voltage: 3.7V (3.3-4.2V) Chargingtime: about 1H Microphone Sensitivity: -42+ 3db Low battery power alarm. 3.3V Speaker specifications.32Q +15% Continuous playing time: > 35 hours Connection time: > 100 hours Working Current: <25mA Static Current: < 5uA Matching code: 0000 (less than version 2.1)