Features - Bluetooth 5.0 - Aux-in - 40mm Driver - Phone Calls Specifications - Bluetooth Version: 5.0 - Driver: 40mm - Impedance: 32ohm - Sensitivity: 19db - Frequency Response: 20hz-20khz - Wireless Operating Range: Up to 15m - Built-in Rechargeable Battery: 200mah - Lithium Polymer Battery: A Leve with Protective Plate - Working Time: Up to 10 Hours at 70% Volume - Standby Time: Approx. 200 Hours - Charging Time: 2.5 Hours What's in the box 1 x Airphone 5 1 x USB Charging Cable 1 x Line-in Cable 1 x User Manual