Ultra-low power consumption, continuous music playback for about 7 hours. The transmission speed is fast and stable, and the unobstructed transmission distance exceeds 20 meters. There are English voice prompts for power-on, power-off, successful pairing, low battery, and maximum volume. The battery can be displayed and the SIRI intelligent voice assistant can activate. The headband is made of high-quality nylon cation, not fade, not shrink, not deform, double-layer design, high-end fashion, light and thin. After fully charged, the static standby time of the Bluetooth headset is up to 500 days! (The headset can be turned on after 500 days of standby!) Features:Bluetooth specification: V5.0 + EDR / A2DP / AVRCP / HFP Frequency range: 2.4026GHz-2.480GHz Transmission distance: more than 20 meters Channel: Stereo Speaker parameters: 32 ohms / 30mm Speaker power: 0.5W * 2 Signal-to-noise ratio: 104dB Function: previous track, next track, volume up, volume down, play, pause, answer a call, make a call, activate SIRI, microphone intercom Playtime: 7 hours Talk time: more than 8 hours Standby time: more than 260 hours (actual test) Charging time: about 2 hours Standby time: 500 days (standby time after fully charged. And the headset can be turned on without charging after 500 days of standby!) The latest Bluetooth V5.0 chip, high-fidelity stereo, powerful bass effect, and clear and stable calls.Package Includes: 1 x Bluetooth headband 1 x USB charging cable 1 x Manual