Technical Specification:

Brand	Remax
Model	Remax TWS-21 True
Type	wireless 5.0
Connectivity	Bluetooth
Color	Black
Microphone	Yes

Features:

Newly upgraded noise reduction, high fidelity sound effects
Using the latest Bluetooth 5.0 technology, TWS binaural stereo Bluetooth headset provides you with very efficient wireless performance, painless and convenient control
Fast charging: mainstream charging interface, consistent with mainstream mobile phone charging port, stable and safe, fast charging, convenient and practical
Bluetooth version V5.0
Connected within 10 meters
4 hours Play time 
2 hours Charging time
40 hours Standby time
300mAh Charging box capacity
Compatible with Apple and Android devices with Bluetooth function

Supports:

Warranty: 3 months of warranty