DA14531 chip Bluetooth 5.1 low energy module compatible with iOS and AndroidCoverage up to 65m (165ft) transmit
Power: 2.5 dBm 10K Byte high transmit speedIts ultra-small size is only 10mm * 11.9 mm * 2mm which provides users with ultra-high flexibility and multiple possibilities. Support communicating with the FeasyBlue app and many other Bluetooth apps