The fastest and latest Blue tooth protocol

The new V531 firmware upgrade to support serial
Ultra-low standby power consumption 400uA ~ 800uA
Small Size: 13.5 * 18mm
Ultra-long connection distance 100 ft / 60 m
Fast reaction speed 0.4 seconds
For Apple, Android
Receive no byte limit, up to 6K Bytes / sec.
MFI does not need to do
Android 4.3 perfect support.
PC Communications perfect support (must be compatible with HM-15)