ENC offer clear sound phone call Auto-pairing& Siri wake-up Open wearable design, comfortable to wear Touch Control: each side has an individual touch key with multi-fuctions IPX5.0 waterproof Specification Battery: 300 mAh Material: ABS Brand: WIWU Connector: USB-C (female) The maximum time to listen to music: 6 h. Bluetooth: 5.3