• Bluetooth Version: Bluetooth V5.1 Jerry 5.1 Model: AC6965 • Battery Capacity: 18650(1200mah)-3.7V+Battery Protection Board • Supported Protocols: A2DP AVRCP, HFP, HSP • Bluetooth Operating Frequency: 2.402-2.480 GHz • Sensitivity reception: -80bBm • Input charging standard: Type-C, DC5V/0.5-1A • Charging time: about 4.5 hours • Actual distance: less than 10 meters (to look at the device without obstacles) • Optimum calling distance : less than 1 meter • Maximum power: 5W • Speaker unit: speaker diameter 57mm*1 + bass diaphragm • Function: support FT card playback, MP3 (32G-MAX). TWS function, FM function. Special note: charging without overvoltage and overcurrent protection, support 5V charging •Size: 92x92x102mm