Characteristics: Is a remote control frequency tester, which can accurately test the remote control frequency and clearly show your voice. This makes it easy for you to adjust the exact frequency you want when you are confecting the remote. Operating voltage: for DC 7.5-10 V Working Current: 51mA Standby current: 40mA Test coverage: 250-450 MHZ Test distance: 10 cm 7.5 ~ 10 V size: 92 * 56 * 24 (approx) Test Method: As long as you approach the remote control to the tester no more than 10cm, it can test your remote control exactly. Application Scale: Electric door controller, auto door burglar alarm controller etc. Remote control, electric lock, garage door Remote control, entry guard, and so on. package 1 x Frequency Counter 1 x power cord