• Bluetooth-compatible 5.3 Connectivity: Ultra-low latency keeps synchronized with audio and video, convenient to keep in contact with your teammates all the time
• Compact Size: The compact body fits easily in your pocket, convenient to carry when traveling, cycling, etc
• Creating Wonderful Music: Adopts advanced powerful 13mm moving coil unit to provide dynamic HiFi stereo sound 
• Long Endurance: The charging bin has a built-in 500mAh battery. Easy to charge the earphones with the charging bin when going outside. It can provide a standby time of up to 300 hours, which lets you enjoy ono-stop music when traveling
• Built-in Microphone: Supports to make hands-free HD phone calls, easy to answer phone calls on the road

Specification:

• Bluetooth-compatible version: 5.3 (AD6973D4)
• Channel: Stereo
• Supported protocols:  A2DP/AVCTP/AVDTP/AVRCP/HFP
• Music playback time: 5h
• Talk time: 4h
• Battery capacity: earphone: 30mAh * 4 (without protection board, headphone board lithium battery protection IC); charging bin: 500mAh (with protection board)
• Charging time: 2h
• Speaker: 13mm
• Standby time: 300h
• Speaker sensitivity: 114DB± 3DB
• Speaker impedance: 32Ω
• Input charging standard: DC 5V
• Bluetooth-compatible operating frequency: 2.402GHz~2.480GHz
• Maximum transmission distance: 10m
• Voice prompt: Support
• Multi-point connection: Not support
• Waterproof level: IPX4