Double horn + double diaphragmBluetooth version: Bluetooth V5.0, Jerry 5.0Battery capacity: 18650 (1500mah) - 3.7VCall / music duration: about hours (default volume 80%)Supporting protocols: A2DP, AVRCP, HFP, HSPBluetooth operating frequency: 2.402-2.480ghzReceiving sensitivity: - 80bbmInput charging standard: Micro USB, DC5V / 0.5-1ACharging time: about hoursEffective distance: less than 10 m (without obstruction in the face of equipment)Optimal call distance: less than 1 meterMaximum power: 5W * 2Speaker unit: speaker diameter 57mm * 2Function: support TF card, U disk (128g-max). Support aux playcolor: Blacksize: 25 * 10.3 * 10.7cm weight: 1001g