Technical Specification:

Brand: Remax
Model: RB-T21
Communication: Wireless
Wireless Type: Bluetooth
Playback time: 3.5 hours
Charging time: about 1.5hours
Vocalism Principle: Dynamic
Style: In-Ear
Battery capacity: 50mAh
Microphone: Yes
Sensitivity: -42+-3DB
Frequency Response Range: 50HZ-10KHZ
Resistance: 16Ω
Support APP: Yes

Features:

Brilliant sound quality that brings a sense of presence,Mini headphones, bass is more powerful,sound field is more open, sound AS view
Driving--GPS/Answer Calls: Car system Bluetooth connected, the signal is good. The quality is very tough, Used to Listen to Navigation, All-round Convenience & More Secure
Sports -- Not Fall:There will be no looseness when running, and it will be faster when Bluetooth is connected. No matter how to shake and how to move, it will not disconnect and fall off,disconnected, and the signal is good.
Play Games & VR USE