... antenna * Working temperature:-25~85 * Standard UART interface quality bluetooth 4.0 moduleBluetooth Module can be applied to kinds of electronic ... UART interface* Support multi baud rate(such asl.2k, 2.4, 4.8, 9.6k, 19.2k, 38.4k, 57.6k, ... 6K)* Energy saving automatically mode.* Support low power working mode/high speed working mode* Safe authentication, data encryption. quality bluetooth 4.0 module