this hm-10 Bluetooth module with BLE 4.0 support, Internal with logic level conversion circuit. No external 5V level to turn into a 3.3V level Power input with anti-anti-circuit. Avoid accidental power plug reversed.
Generally, users are using HC-05 Bluetooth module but it doesn't support with iPhone but ble4.0 is perfectly work with iPhone also. Supported devices are iPhone 4s, 5, 5s, or later and almost all Android Devices.
Interface: Dual USB 2-Port
support Central and Peripheral mode switch, modify by AT commander
UART interface and with baud rate setup function
Operation Level: 3.3 V
Working frequency: 2.4GHz ISM band
Modulation method: GFSK(Gaussian Frequency Shift Keying)
Speed : Asynchronous - 2.1Mbps(Max) / 160 kbps, Synchronous - 1Mbps/1Mbps(Max)
Security: Authentication and encryption
Service: Bluetooth SPP(Master & Slave)
Size : 27 x 13 x 0.8mm
1 x HM-10 Bluetooth module