Description: Adopt advanced Bluetooth 5.0 technology, stable signal and fast transmission without delay. Listening time: about 5-6 hours; talk time: about 5-6 hours; battery capacity 60 mAh. Support battery display for iPhone. Real-time monitoring of battery voltage, low voltage warning, automatic shutdown protection for ultra-low voltage. Support for switching to the next song; support for switching between Chinese and English; Chinese and English caller ID and voice prompts, support for customizing other languages. In-ear design and mini size, comfortable to wear. Hi-fi stereo sound quality, powerful bass performance with large size speaker drive. Noise reduction technology, enjoying clear heavy bass music. Specification: Model: X7 Transmission range: 10 meters Function: battery display, call function, support music Bluetooth protocol: 5.0 Channel: stereo Size: 20x15mm/0.78x0.59inch Package Includes: 1 Piece Wiress Earbud (Single) 1 Piece Data Cable 1 Piece User Manual Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.