Weight and dimensions Product width: 106 mm Product weight: 24 g Product length: 132 mm Product height: 43 mm Efficiency Wearing style: Headband Volume control: Button Control Type: Buttons Headset type: Stereo Product type: Headset Application: Music / Calls Product color: Black Package contents Package Contents: Headphones x 1 Ports and interfaces Bluetooth: Yes Connection method: Wireless Bluetooth range: 10 m Bluetooth profiles: A2DP V1.3, AVRCP V1.6, HFP V1.7 Bluetooth version: 5.3 Battery Music playback time: 7 hours Input voltage (headphones): 5 V Talk time: 6 hours Charging time: 2 - 3 hours. Battery capacity: 140 mAh Standby time: 240 hours Microphone Microphone type: Built-in microphone Safety warning Warnings Keep away from children. Do not use near sources of heat or fire. Check the condition of the batteries regularly to prevent leakage. Headphones Frequency response: 180 - 16000 Hz Headphone Structure: Bone Conduction Headphone sensitivity: 86 dB Transducer diameter: 16 mm IP protection class: IPX5