This CAME TOP432NA transmitter is easy to program (self-learning). It operates at 433.92 MHz. Acoustic signals of different frequencies are not compatible. CAME brand Remote control type Transmitter/Remote control Application: door/garage door/multi-purpose p> Power battery White color Number of channels: 2 channels Number of keys: 2 keys Product model: 432 HzNA&lt; /p&gt; Modulation method: ASK Transmission power: 3~6dBm Transmission current: 21mA Current rest: &lt; 0.15uA Operating frequency: 315/433.99 MHz Operating voltage: DC12v Battery type: button cell *2&lt;/ p&gt ; < p>Shell material: ABS Product dimensions: 68*33*11 mm Product weight: 18 g Frequency operating time: 433.92 MHz < p>Dimensions: 32 mm wide, 68 mm long Use range: 150 m [How to activate] 1. Delete First Hold both buttons on the remote control at the same time until the LED flashes from slow to fast, which means the code clearing is successful. The LED will continue to flash for approximately 15 seconds. Please perform step 2 during this time 2. Selected action button Press the button you need to copy. At this time, the fast flashing light has just changed to a stable state. Press the button you need to copy, then press the quick flash indicator instantly, in a constant lighting state 3. Copy remote control Press the button on the old remote control to be copied and try to stay as close to the copied remote control as possible. At this time, the copy remote control will slowly flash three times and turn off, indicating that the pairing is successful. For other buttons, follow the above method one by one.< /p >