Original HM-11 module, DSD TECH brand guarantees and we accept refund without any excuse.
Bluetooth master and slave module, Through the AT command, you can set this bluetooth module to the master mode can also be set to slave mode, even in iBeacon way work . .it also Supports Apple Notification Center Service (ANCS)
Compatible with iOS 7 and later and Android 4.3 or later
The same AT Command with HM-10. Working voltage 3.3V ,Default rate of 9600.
Customer Support:Offering permanent technical support and a 1-year product replacement service. All questions will be answered for you within 1 business day