Notice: 1. Remote control copying is only possible with remotes operating at the same frequency. Please verify the frequency of the remote you intend to copy before purchasing. 2. This remote control supports copying of fixed-code remotes only. It does not support copying computer codes or rolling codes. Specifications: Transmission Frequency: 433 MHz Channels: 4 Model Number: 433 MHz Duplicate Remote Control Wireless Communication: RF Key Layout: ABCD Functions: Copy remote control / Test remote control / Clear memory Working Current: 10 mA Radiated Power: 10 mW Dimensions: 5.4 × 2.9 × 1.4 cm Weight: 28 g Transmission Range: 50–100 m (in open area, with receiver sensitivity of -100 dBm) Compatible Applications: Electric retractable doors, elevators, gate openers, rolling shutter doors, garage doors, sliding doors, LED lighting controls, firework igniters, vehicle passenger doors, security alarms, door alarm devices, motorcycle anti-theft alarms, etc. Copying Procedure: 1. Clear Memory: Press and hold keys A and B simultaneously (or Lock and Unlock keys, depending on model). After the LED flashes three times, release one key while continuing to hold the other. Then press the released key three times. The LED will flash rapidly, indicating all stored codes have been erased. After clearing, pressing any button will not activate the LED. 2. Copy Code: Hold the original remote and the duplicator remote close together—ideally side-by-side on a flat surface with minimal distance between them. Press the copy button on the duplicator remote. When the LED flashes three times, copying is complete. Repeat for each button. For remotes with low transmission power, place the original remote directly against the duplicator remote during copying. Avoid electrical noise and interference. If copying fails, clear memory and retry. Notes: 1. Always clear existing codes from the duplicator remote before initiating a new copy. 2. Performing an unlock operation will also erase previously stored codes. Package Includes: 1 / 2 / 3 / 4 / 5 / 10 pcs of 433 MHz remote controls (with keychain) 1 x User Manual