Note: When purchasing this Bluetooth headset, please read the following instructions: Due to long-term transportation, the power of TWS will be exhausted. You will not be able to use the headset when more→you receive the package. It may be powered off. The first thing to do is to charge the headset box. Very important. Thank you! Specifications: Product model: K69 Bluetooth version: Bluetooth 5.2 Earphone Type: Neckband Microphone: Yes Noise Reduction: Active Waterproof: Yes Playback Control: Yes Battery Capacity: 180 mah Listening Time: 13 hours Charging Time: 1-2 hours Transmission Distance: 10m Speaker impedance: approx approx.