ITEM NAME:2x 433Mhz Wireless RF Transmitter Module+ Receiver Alarm Regeneration Arduino Gw.2 x 433Mhz RF transmitter and receiver kit Module for Arduino ARM WL MCU Raspberry. Receiver sensitivity:-105DB. Pinout from left → right: (DATA; VCC; GND). An external antenna: 25cm ordinary multi-core or single-core line.