2.5V super farad capacitor, suitable for super capacitor protection board.Using high-precision voltage stabilizing IC as a reference, the default voltage stabilization is 2.5v50mV (adjustable resistance R4, R5 adjust the voltage limit) Each capacitor is equipped with a protection board to effectively protect each capacitor from exceeding the limit voltage. The power tube and large copper sheet on the back of the resistor improve heat dissipation and work more stable. The diameter is 35mm, the fixed hole diameter is 5.8mm, the center distance between the two holes is 12.5mm, and the pad diameter is 10mm. (Based on 600-700F super capacitor) Package Includes: 6 x Super Farad Capacitors Specifications: Type: Super Farad Capacitor Protection Board Weight: approx. 45g Materia:Alloy+Silicone+PC Diameter:3.5cm Vot:2.5V note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.