Description/Features: Stable frequency and performance of the sound meter; Wide working voltage range; Good product consistency and high cost-effectiveness. Please refer to our pin order in detail and compare it with your host's pin order to see if it is the same. Wireless transmitter module, wireless transmitter, transmitter board, 3-12V universal voltage. Foot position (from left to right) and instructions for use: Function Description of Foot Position Names: 1 ATAD data input pin 2 VCC power supply positive pole 3 GND power supply negative pole The transmission module has a total of three external interfaces, which are represented in English. "VCC" represents the positive pole of the power supply, "ATAD" represents the input, and "GND" represents the negative pole of the power supply. Specifications: Model: MX-F01 Working voltage: 3-12V Working frequency: 433.92MHz Standby current: 0mA Working current: 20-28mA Transmission distance: Greater than 500m (sensitivity of open receiving board above -103dBm) Output power: 16dBm (40mW) Transmission rate: Less than 10Kbps Modulation method: OOK (amplitude modulation) Working temperature: -10°C to +70°C Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Material: PCB Color: As shown Package Contents: 1 x Module (Single Transmission) 1 x Module (Single Reception) Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.