Test ranges: For Remote Control Tester can be used on most makes and models of vehicles including trucks, remote control models and domestic appliances. Digital Display: Let you easy to see the tested frequency clearly. Excelent Material: The Solid plastics material made up the products, it is wear resistant and durability Battery Power Supplys: 9V battery can use for long time, and which can easy to buy from your local supermaket. Note: When you use the frequency tester, please keep far from the other electronic device, they will intere the frequency.For example, cellphone(need to turn on the airplane model), smart watch, computer, fan, LED light, etc. The Control Tester has been developed to assist with the diagnosis of all types of (IR) Infra Red and (RF) Radio Frequency remote controls. It could let you easy to confirm if the frequency of new keys or remote controls the same as the old one. Type:(IR) Infra Red and (RF) Radio Frequency remote controls Frequency Range:10MHz-1000MHz Work Battery Operated:9V (not include) Currrent Consumption:50mA How to use? Simply place the remote control the LCD screen and press a button on your remote key fob, a signal will be sent to the Remote Control Tester and a numeric frequency will be displayed on the LCD screen. NOTE:When using this frequency tester with a key or remote control, please remove other products that may cause signal/frequency interference from the work area at least 1 meter , such as phones/lights or other products with electronic components. Kind reminder: When pick up the battery connector, please avoid pulling the cable. Place the tester on the desktop before pick up the connector, and that the device is not left hanging in mid-air. Colour:Black Material:Plastic PackageContents: 1 * Remote Control Tester 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.