Lonsdor RT4 IR FR Remote Frequency Tester

The Lonsdor RT4 IR/FR Remote Frequency Tester is a handheld diagnostic tool designed to check the transmission signals of remote controls, especially automotive or key fob remotes. It helps verify whether the remote sends the correct radio frequency (RF) signal and whether its infrared (IR) emitter is functioning.

Typical Uses

• Key Fob Programming & Diagnostics: Helps locksmiths or technicians verify that a car key or remote is transmitting correctly before programming or replacement.

• Remote Repair/Verification: Quick check of whether a remote’s transmitter (RF or IR) is working without needing complex equipment.