odel No.: XO-BE50 Bluetooth Specifications: Bluetooth V5.3 AB5365C Bluetooth Frequency Range: 2.4G-2.480GHZ Bluetooth Protocol Support: A2DP/AVRCP Wireless Transmission Distance: single 10 meters Amplifier IC: MIX8911 Rated Power: rated power 5W maximum power 7W Rated Impedance: 3 ± 15% Ω higher than the lowest point of frequency impedance F0 DC Resistance: 3.0 ± 7%Ω with impedance test equipment Output Sound Pressure Level: 81dB Frequency Range 600Hz/: 800Hz Effective Frequency Range: F0 ~ 12KHz average sound pressure level drop 10dB Distortion Rate: ≤5% at 1000 Hz / 1W Resonance Frequency: 160±15%Hz (LMS) Tested with 1V in LMS Battery Capacity: Li-ion 18650 cylindrical 1200mAh / 3.7V Charging Specifications: DC5V/0.5A TYPE-C Full Charging Time: about 5 hours Playback Time: 3 hours (80% volume) Standby Power Consumption: 12 hours Key Lifespan: more than 5000 times Interface Function: the bottom USB-C input supports audio input, the 3.5 audio interface only supports audio output (the 3.5 self-wiring port must be 4-pole to connect for sound to play correctly) Weight: 297g Product Size: 208mm*112mm Operating Temperature (range): -10 ~ +50 °C Exterior Material: ABS