Features: (Receiver module parameters): Voltage: DC5V Static current: 4MA Receiver Frequency: 433MHZ Receiver sensitivity:-105DB External antenna: 32CM single-core wire wound into a spiral (Transmitter module parameters): Transmission Distance :50-100 meters (voltage the effect is different) Working voltage :3.0-12V Ways of working: AM Transfer rate: 4KB / S Transmit power: 10mW Emission frequency: 433M External antenna: 25cm ordinary multi-core or single core line Pinout from left right: (the DATA; the VCC; GND with) Specifications: Size:(Receiver module parameters):30 x 14mm(L x W) (Transmitter module parameters):19 x 19mm(L x W) Package include: 1 x Wireless transmitter module 1 x Wireless Receiver module