Wide RF frequency range from 200MHz to 900MHz, suitable for detecting most common remote controls. Accurate RF signal detection to identify if a remote control is transmitting properly. Clear indication of signal presence to help distinguish between faulty remotes, weak batteries, and receiver problems. Built-in data comparison function to verify if a replacement remote matches the original signal pattern. Greatly improves accuracy when pairing, cloning, or troubleshooting RF transmitters. This universal remote control tester covers a broad RF frequency range from 200MHz to 900MHz, allowing you to easily detect and analyze most common remote controls used for garage doors, gate openers, car alarms, door locks, rolling shutters, and other RF-controlled devices. Quickly identify whether a remote control is transmitting properly. The RF frequency detector provides clear indication of signal presence, helping you distinguish between faulty remotes, weak batteries, and receiver problems during daily maintenance or professional inspection work. Color: Black Material: plastic Package Contents: 1*RF Frequency Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.