Specification: Material: ABS Color: Black(Receiver) + Gray (Transmitter) Power Supply: 9V Battery (NOT included) Channel: 2 CH Remote Control Distance: 0-3000m ( Ideal distance without any block and signal interfere, it would rise and fall about 10%-90% with the block and signal interference.) Encode: Fixed code, soldering Frequency: 314MHz Decode: Fixed code, soldering Power Supply (Operating Voltage): DC 12V Relay: 10A/250V AC, 10A/125V AC, 10A/30V DC, 10A/28V DC Work Voltage Range of Relay: AC 110-240V or DC 0-28V Operating Temperature: -40° to +80° Receiver: 8 * 3.5 * 2cm / 3.1 * 1.4 * 0.8in Remote control: 15 * 4 * 2.5 cm / 5.9 * 1.6 * 1.0in Package Weight: 92g Modes: 1. Toggle/Self-Lock: Press->On; Press again->Off - Press one button for one time is working/ON .press the same button again is stop/OFF.(1 channel switch(receiver) need 1 button remote control (transmitter). 2. Latched/Inter-Lock: Press->On; Press other button->Off - Press one button is working/ON ,press another button is stop/OFF. ( 1 channel switch( receiver) need 2 buttons remote control (transmitter). 3. Momentary/Jog: Press and hold->On; Release->Off - Keep pressing one button is working /ON. loosen your finger is stop/OFF. (1 channel switch(receiver) need 1 button remote control (transmitter)). (Original Setting is Momentary, Change it by yourself.) Package Included: 1 * 3KM Remote Control Transmitter (Battery is not included!) 1 * Remote Receiver Module (Including shell)