Tosuny 3KM Long Range Wireless Remote Controller, DC 12V 2CH RF Control Switch System with Transmitter plus Receiver, Wireless Control for Light/Motor/Door/Electric Lock/Window

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: 315MHzDecode: Fixed code, solderingPower Supply (Operating Voltage): DC 12VRelay: 10A/250V AC, 10A/125V AC, 10A/30V DC, 10A/28V DC Work Voltage Range of Relay: AC 110-240V or DC 0-28VOperating Temperature: -40° to +80°Receiver: 8 * 3.5 * 2cm / 3.1 * 1.4 * 0.8inRemote control: 15 * 4 * 2.5 cm / 5.9 * 1.6 * 1.0inPackage Weight: 92g Learn Code and Remove Code: 1. Learn: Press the learning code .the indicator from on to  off, loosen your finger, press any button of the remote control, the indicator flash 2 times and off, it means you learn it correctly.2. Remove: Press the learning button about 8 seconds, the indicator turns on to off, it means the Code had been removed correctly.Note:1. The battery is very dangerous in transit, so you need to buy the battery yourself.2. Please allow 0.5-1 inch difference due to manual measurement. (1 inch=2.54cm)3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!