BASEUS ENCOK A02 wireless earphone. Provides high-quality, clear sound. Equipped with a voice recognition system. Controlled by only one button. Noise reduction system minimizes ambient noise, providing high-quality, clear sound. Not only for listening to the music - the ENCOK handset also lets you have conversations. Voice recognition technology allows you to make calls without having to select them from the smartphone menu. Two devices can be connected - the earphone can connect to two devices at the same time. The touch button, hidden under the central layer of the earphone, enables efficient product control. Built-in LED indicates the handset's charging status. Product compatible with iOS and Android. Specification: Wireless range: up to 10m Frequency range: 20-20.000 Hz Battery capacity: 60 mAh Charging time: 2h Materials: ABS + Silicone Bluetooth version: 4.1 Standby time: 120h Talk time: 5h Music playing time: 4h