China Remote Garage Roller Door Transmitter T3401

1, Technical Characteristics
1.1 Frequency: 433.92MHZ
1.2 Code:rolling code
1.3 Channel: 1,2,3 or 4
1.4 Battery: 3VDC CR2032
1.5 working distance : 50M(indoor)
2, Application Method
2.1 number 1,2,3,4 on the button means channel 1,2,3,4. The indicator light of the Chosen channel will turn on when you press the button
2.2 You could control the device with the transmitter by pressing 1,2,3,4
Example:
Use button 1 to control the device
Method:
1, Press button 1, the light of channel 1 turns on.