1. Detect frequency, range from 200MHz to 1GHz 2. Detect rolling code HCS 3. Lower cost 4. Simple operation Hand-hold Frequency Scanner Feature: 1: Detect frequency, range from 200MHz to 1GHz2. If the remote is rolling code HCS, the device will have a beep. 3. Power supply: battery 6F224. Accept OEM packaging. Mini Frequency Scanner for RF remote