Feature: 1. Detects radio frequency and/or infrared emission from key fobs and remote controllers. 2. Remote Tester can help you read out your key frequency fast and accurately without the need to dismantle the fob, remote or vehicle. 3. RF range: 418MHz, 433-434MHz. 4. Suitable for a wide variety of vehicles. 5. Easy operation. Press the key, the infrared indicator turns on - good, off - bad. Specification: Features: Detects radio frequency and/or infrared emission from key fobs and remote controllers. Remote Tester can help you read out your key frequency fast and accurately without the need to dismantle the fob, remote or vehicle. RF range: 418MHz, 433-434MHz. Suitable for a wide variety of vehicles. Easy operation. Press the key, the infrared indicator turns on - good, off - bad. Specifications: Model: EM273 Auto power off: about 70-100 seconds after the tester is turned on Power consumption: 26mA Battery: 9V, 6F22(NOT INCLUDED) Operation environment: 0-50℃，relative humidity≤85% Size: 132.5*81.5*28.5mm Package size: 15*10*5cm Package weight: 130g Package list: 1 x Key Frequency Tester Package List: 1 x Key Frequency Tester