Description: ABS: The frequency counter is made of ABS, durable and wear-resistant. Suitable for: applicable to electric door controller manufacturers, automatic door manufacturers and other fields. 4-digit screen: The frequency counter uses a 4-digit screen to clearly display the results. Portable: The frequency counter is easy to use and carry. Function: The frequency reader counter is a wireless remote control device for testing frequency, which can accurately test the frequency of the remote control device and can clearly display it. Specification: Material: ABS. Color: As shown. Size:Approx.10×6×2cm/3.93x2.36x0.78 inch. Effective Test Range: 250Mhz to 450Mhz Valid Test Range: Less than 10cm Powered by a 9V 6F22 battery (Not included) for Operation Voltage: DC9V Standby Current: 40mA Operating Current: 51mA Note: How to use 1 : the measured wireless remote control frequency, the remote control on the sensing zone press any key to display the frequency shows the frequency of the remote control . 2 : measured infrared remote control or other launch, the position of the remote control facing the infrared receiver (INPUT) click any key IR position red light, said some of the remote control transmitter normal. Package Includes: 1 Piece Frequency Meter.