... DESCRIPTIONN72 is Bluetooth4.0 single mode module, device targeted for low power sensors and accessories.The module offers all Bluetooth low energy features: radio, stack, profiles ... Scale, HID, etc.detailed profiles depends on the firmwareFrequency Band2.402G ~ 2.480GMaximum Data Rate1MbpsRF Input Impedance50 ohmsBaseband Crystal OSC16MHzInterfaceUART, PIO, AIO ...