Frequency resolution: 200K (digital signal), 1K, 100HZ, optional Test distance: 450M about 8 meters. 150M about 5 meters Testing range: 50MHZ --- 2400MHZ Battery:9V laminated battery 6F22 Automatic shutdown: 2 minutes. (200K gear without automatic shutdown) Usage: Operation: Single button to achieve all functions. Press the multi-function key to power on Display the welcome interface --Release the key to return to the pre-shutdown operation mode Continuous keys to select step 200K --Release the key to enter the 200K digital signal dedicated mode Continuous keys to select step 1K --Release key to enter 1K resolution mode (sampling fast) Continuous key press to select step 100Hz --Release key to enter 100Hz resolution mode (high accuracy) Continuous key press to enter working mode after (1K, and 100Hz) Entering working mode after (200K) Quickly press and release the multi-function key Press the multi-function key Lock the screen display to show the shutdown prompt Press and release the multi-function key again quickly Release the key and turn off the power Unlock the screen Press the multi-function key for more than 2 seconds Display the shutdown prompt Release the key to turn off the phone Color: As Shown Material: metal Package Contents: 1 x -560 Frequency meter 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.