:The A7139S433mini is a surface mount Radio Frequency (RF) module manufactured by Vollgo. It is compliant with the RoHS directive, and is designed for applications such as remote control, wireless monitoring, data exchange, and home automation. The module provides excellent sensitivity, high selectivity, and power efficiency, and is integrated with an integrated RF transceiver, baseband, and a controller. It is capable of transmitting data up to 433MHz with up to 50m wireless range, using FSK/ASK modulation, GFSK modulation, and Manchester coding. Additionally, the module has an external antenna port, which allows for signal amplification and range optimization. The A7139S433mini requires a 3.3V supply voltage.