Input voltage: DC 4.8-6.5V Output signal width: 900-2100s Output signal frequency: 50Hz/125Hz/250Hz Functional Description: (I) Power-On Default: After powering on, the device enters manual mode by default, outputting a 50Hz signal. (II) Device Mode ( the MODE button to switch): Manual Mode: Adjust the potentiometer to output a signal with a width of 900-2100s. Medium Mode: Fixed output of a 1500s signal. Auto Mode: Automatically outputs a signal with a width of 900-2100s, increasing from 900s to 2100s, then decreasing from 2100s to 900s, and repeating this cycle. Rotating the potentiometer adjusts the signal change rate. (III) Device Frequency ( the FREQ button to switch): Outputs a 50Hz signal with a period of 20ms, a 125Hz signal with a period of 8ms, and a 250Hz signal with a period of 4ms. Color: As shown Material: Plastic+Metal Package Contents: 1 x 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.