Features: Condition: new. Material: plastic. Color: as shown in the picture. Input: Input: 11-12.5V. VCC: Connect; Positive power supply: Connect; Negative operating current supply: Approx. 138mA (relay absorption mode). Static operation, Approx. 8mA (relay mode). Module Type: 433MHz 4-channel wireless module (4 channels can learn separately). Receiving Range: Between 15 and 100 meters (can go through walls). Working Mode: Self-locking, Jogging two types of working modes (Each channel can be independently set to self-locking or jogging). Working Instructions: D5 (Power indicator), D1-D4 (relay indicator), D6 (Learning indicator). Output Mode: Normally open (CK), Common (COM), Normally closed (CB) (Note: normally closed and common in; normally state is connected, so that the output of the module is used as a switch; the switch is often used when; Receiving Module: Approx. 6.5 x 5.6 x 2.2cm. WEIGHT: Approx. 77g. Note: All data are manual measurements, please allow an error of 1-3cm. Due to the difference in light and display, there will be some difference in color, subject to the physically received object.