Features: A great replacement for door open button or other switches of devices, widely used in elevating controller, automobile, household appliances, machine tools, alarm system and other automatic control area. An automatic switch for automatic regulation, with self-lock function, allows safety protection and circuit conversion. High-quality plastic material and professional PCB circuit board, safe without noise and spark, anti-corrosion, moisture-proof and anti-vibration. Control Mode: 1. Self-Lock Mode: Press->On; Press again->Off (Need 1 channel switch and 1 remote control button.) Press one button for working/ ON. Press the same button again for stopping/ OFF. 2. Inter-Lock Mode: Press->On; Press other button->Off (Need 1 channel switch and 2 remote control buttons.) Press one button for working/ ON, press another button for stopping/ OFF. 3. Jog Mode: Press and hold->On; Release->Off (Need 1 channel switch and 1 remote control button.) Keep pressing one button for working/ ON. Remove your finger for stopping/ OFF. Specifications: Receiver: Working Voltage: 12V Max. Loading Current: 10A Frequency: 315/ MHz Size: Approx. 35 x 32 x 19mm/ 1.4 x 1.3 x 0.7in Transmitter Color: White Frequency: 315/ MHz Button: 1 Button Battery: 2016 Button Battery (NOT Included.) Size: Approx. 35 x 60 x 9mm/ 1.4 x 2.4 x 0.4in Package Size: Approx. 90 x 80 x 30mm / 3.5 x 3.1 x 1.2in Package Weight: 42g Package List: 1 * Wireless Circuit Board Relay Receiver 1 * Remote Control Transmitter (NOT Includes Battery)