... Working temperature:-25~85 * Standard UART interface quality bluetooth 4.0 moduleBluetooth Module can be applied to kinds of ... , the process will be completed automatically.Features:* Bluetooth 4.0* On-board antenna or External antenna* Working ... interface* Support multi baud rate(such asl.2k, 2.4, 4.8, 9.6k, 19.2k, 38.4k, 57. ... mode* Safe authentication, data encryption. quality bluetooth 4.0 module