Feature: 1. Output Protection: With output protection, there is a self recovery fuse on the board for short circuit protection. 2. Convenient Operation: The output interface adopts sound wiring clip, which is very convenient for wiring test. 3. Non Polarity Input: The LM317 adjustable regulated power supply kit has a rectifier circuit input and can be input without polarity. 4. AC DC Input: AC and DC input, the board is equipped with a new 2200UF large capacity filter capacitor. 5. High Quality Materials: Made of high quality ABS material, this adjustable regulated power supply kit is strong, durable and has a long service life. Specification: Item Type: Adjustable Regulated Power Supply Kit Material: ABSBoard Size: Approx. 60 x 33mm / 2.4 x 1.3in DC Input: 5 to 35V AC Input: 6 to 25V Output Voltage: 1.25 to 30V DC Maximum Output Current: 1A Minimum Voltage Difference Between Input and Output: 3V (Input Voltage Must Be at Least Greater Than Output Voltage 3V60x33). Package List: 1 x Adjustable Regulated Power Supply Kit Note: AC and DC input, the board is equipped with a new 2200UF large capacity filter capacitor