Feature: 1. Upgrade 5.0 Bluetooth chip, automatically start and match, real‑time display of LED smart cold light digital power supply. 2. Phone call, listen to songs, intelligently filter the noise, enjoy the high‑definition call effect, not affected by the noise environment, 3. Strong compatibility, regardless of brand mobile phone and model, devices that support Bluetooth can use this headset. 4. Enjoy high‑fidelity scenes and enjoy immersive 9D stereo surround sound effects. 5. The newly upgraded smart touch control makes the operation more comfortable and handy. Specification: Item Type: Bluetooth Earphone Material: ABS Color: Black Weight: Approx. 65.0g/2.3oz Bluetooth Version: Dual Mode V5.0+EDR Support Protocol: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Battery Capacity: Earphone: 40mAh, Charging Box: 350mAh(Include) Playing Time: about 4 hours Standby Time: about 100 hours Full Charge Time: about 1 hour FrequencyResponse: 20Hz-20kHz How to use: 1. Take out the headset from the charging compartment and turn on the headset 2. The headset enters the pairing state (red and blue flashing alternately) 3. Turn on the Bluetooth function of the mobile phone, search for the Bluetooth name and connect Package List: 2 x Earbuds 1 x Charging Box 1 x Manual 1 x Charging Cable