The fastest and latest Bluetooth protocol

The new V531 firmware upgrade supports serial communication.
Ultra-low standby power consumption: 400 µA ~ 800 µA
Small size: 13.5 * 18 mm
Ultra-long connection distance: 100 ft / 60 m
Fast reaction speed: 0.4 seconds
For Apple, Android
Receive data with no byte limit, up to 6K Bytes/sec.
MFI certification is not required.
Perfect support for Android 4.3.
Perfect support for PC communication (must be compatible with HM-15).