Batteries are not included; you must purchase a 6F22 9V battery separately.

Car keys and door controllers can be tested directly for frequency; they must be placed in the TX area for accurate frequency testing. TV (IR) remote controls cannot be tested for specific frequencies; you can only test the functionality of the buttons using LED lights.
Spec:

Item Type: Frequency Tester
Material: ABS
Application: The remote key infrared frequency tester is an instrument for testing the frequency of the remote control. It can test the frequency of the remote control and display it clearly; it can also test the quality of the infrared induction; It is convenient to adjust the frequency you need.
Test Frequency Range: 100M HZ - 1G HZ
Working Conditions: -10 ℃ - 40 ℃
Working Relative Humidity: ≤ 80%
Storage Conditions: -20 ℃ - 50 ℃
Storage Relative Humidity: ≤ 85%
Battery Model: 6F22 9V (Not included Battery)
Application: Applicable to all of keys and electric door controllers, car burglar alarms and other remote controls, electric locks, garage doors, remote controls, access control, etc.

Package List:
1 x Frequency Tester1 x Manual