Colour:As Shown Material:PCB 1. -6LGD parameters: Operating voltage: 5.0VDC0.5V Working current :8mA(5.0VDC) Working principle: Superheterodyne (VCO, PLL) Working method: OOK or ASK Operating frequency: 315MHz(more than 8 frequencies such as 260-440 can be ) Encoding type: fixed code Operating temperature :-30Cand80C Sensitivity: -107dBm(50) 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 10percent -30percent ) Transmission rate: Less than 10Kbps Operating temperature: -10C-and70C 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) Package Contents: 2 x Modules 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.