Capacitor discharge method: 1200V/15A IGBT quicker and safer discharging. Capacitor's capability: V4.0 Capacitor discharge pen can be used on/below 4700uF/450V capacitor discharging, generally, the higher voltage on the capacitor, the discharging capability will become smaller. Discharge voltage scope: AC 8-630V/DC 12-900V.( The Video used 1980uF 320V capacitor doing the discharging test) Discharge time: less than 40 seconds. After continuous 40 seconds discharging, pls. let the discharge pen to rest a while to go on with discharging. The red and black probe is silicone and super flexible even in cold winter, regardless of the positive and negative poles, the positive and negative poles can be connected freely. Just connect to the two poles of the capacitor. Colour:black Material:ABS The Length of probe: 110CM/43.3IN With LED indicator and Buzzer Applications: For discharging high voltage UPS etc AC/DC high voltage or storage capacitor. note: Once the LED indicator light and buzzer off, you need to continue discharging for about 10 seconds to ensure remaining power has been discharged over. Package Contents: 1 * Capacitor discharger 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.