Precise details:Specification:Brand:LenovoModel:L02 Material:plasticColour:Blackbluetooth solution:V5.0Power:2.5WBattery capacity:2000mAh/3.7VSpeaker diameter:45±0.3mm*1Signal to noise ratio:≥75dBFrequency:100Hz-16KHzWorking voltage:2.2vSupport protocol:A2DP, AVRCP, HFPWireless range:≥10 metersPlaying time:8 hours (60% volume)Charging time:2-3 hoursCharging method:Type c 5V/400mANet weight:263gGross weight:350gProduct size:17*8.3*8.3cmPacking size:20.3*11.1*10.8cmPacking method:cartonPacking Included:1* bluetooth speaker1* Type-c charging cable1* English manual