Feature: 1. HiFi lossless subverts your sense of hearing, with sufficient low‑frequency volume, accurate positioning, low sound coloration, and medium and high‑frequency layers are distinct. 2. Advanced Bluetooth 5.0 chip, low power consumption, fast transmission, stable connection. 3. Using a 40mm subwoofer driver unit, it can express extremely explosive heavy bass, deliver a thick and powerful sound quality, and reduce sound distortion in the full frequency range. 4. Built‑in high‑definition microphone dual noise reduction technology, making calls more convenient. 5. Fold and store at will, stretch freely, ergonomic design, long‑term wear and no pain, fine‑tuning design, no need to worry about pinching hair when wearing. 6. 3 connection methods to meet different needs, 3.5mm headphone audio cable can be inserted, Bluetooth connection, storage card can be inserted. Specification: Item Type: Headphone Material: ABS Color: As Pictures Shown Weight: Approx. 328g/11.6ozBluetooth version: Bluetooth 5.0 Receiving distance: 10-30m/32.8-98.4ft Speakers size: 40mm/1.6in Frequency response: 20Hz-20KHz Impedance: 30Q Battery capacity: Polymer lithium battery 400 mAh (shipped with built-in battery) Charging time: 2-3 hours Battery life: 6-10 hours (default volume) Standby time: 300 hours How to use:1. Press the power button to turn on and automatically enter the pairing state (the indicator flashes blue) 2. Turn on the Bluetooth device of the mobile phone, click Search Bluetooth device, until the Bluetooth device of this model is searched, click to connect, there will be a voice prompt when the pairing is successful. Package List: 1 x Headphone 1 x Audio Cable 1 x USB Charging Cable1 x Manual