Hiland cheap 3- Channel audio Remote Control door Transmitter T5502 with fixed code 433.92MHz

I. Technical Characteristics

1.1 Frequency: 433.92MHZ
1.2 Code:rolling code
1.3 Channel: 4
1.4 Battery: 3VDC  CR2032
1.5 working distance : 50M(indoor)

II. 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. 

Self-learning function (For some receivers)
STEP1: Use the transmitter that already has been learned as old Transmitter, press button 1 and button 2 at the same time
STEP2: then press button 2 to let the receiver enters into the learning process.
STEP3: Press the same button on the new transmitter twice. The learning process done. In this way , new transmitter can be learned without pressing the learning button on the control board of receiver.