40mm speaker (2.4G BK2635+Bluetooth BK3288X) Broadcom chip 17±15 Impedance Attenuity: 106±3dB Response to frequency: 20 Hz to 20 kHz Sensitivity of the microphone: -42±3dB Ten meters is the wireless distance. Plug: 2.4GHz, Bluetooth, Type-C, and 3.5mm audio cables 600mAh lithium battery Working hours for 3.7V 2.4G: 23 hours Working hours for Bluetooth: 26 hours It takes roughly three hours to charge. Method of charging: (Type-C) 5V USB Weight of the product: 186.6g