Colour:As Shown Material:PCB<br><br>1. -6LGD parameters: Operating voltage: 5.0VDC±0.5V Working current :≤8mA(5.0VDC) Working principle: Superheterodyne (VCO, PLL) Working method: OOK/ASK Operating frequency: 315MHz(more than 8 frequencies such as 260-440 can be ) Encoding type: fixed code Operating temperature :-30°C+80°C Sensitivity: -107dBm(50Ω) Speed: Less than 9.6Kbps(315MHz, -95dBm) Size: 41 x 24 x 8mm 2. -4A parameters: Working voltage: DC9V Operating frequency: 315M, 433M(more than 20 frequencies such as 260-440 can be ) Working current: 100mA Transmission distance: 4000 meters (actual 10%-30%) Transmission rate: Less than 10Kbps Operating temperature: -10°C-+70°C Connector: 6PIN pin interface Size: 49 x 31 x 8mm Code type: Fixed code (PT2262 chip) (Different batches may have different printed characters, but it does not affect the use)<br><br>Package Contents: 2 * Modules<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.