Package include : 1pcs STX882 433MHz ASK Wireless RF Transmitter Module 1pcs SRX882 433MHz ASK Wireless RF Receiver Module) 2pcs SW433-TH32DN (433MHz Nickel Plated Spring Antenna) STX882 is a ASK transmitter module with small size, ultra high power, low harmonics. With high stability, it can be achieved at 50mW power when the voltage is 3.6V, it is the maximum ransmitter power module under the the same voltage in the market. Data port of the module can be connected to the microcontroller directly, make wireless product development and production more convenient. Features: - Frequency Range: 433/315 MHZ - ASK modulation mode - Small volume low self radiation - High-power long-range - Frequency stability - Various international testing standards SRX882 ASK Wireless Remote Control ---------------------------------------------------- Superheterodyne Receiver Module SRX882 is a superheterodyne receiver with micro power and strong driving force, is supplementary STX882 / STX888 module. Data port of the module can be connected to the microcontroller directly, make wireless product development and production more convenient. Features: - Frequency Range: 433/315 MHZ - ASK /OOK modulation mode - Super anti-power interference - Low-power sleep less than 1uA - Low self radiation - Small size - Frequency stability and reliability - Various international testing standards