LM317 voltage adjustable module; voltage adjustable module 1.5V ~ 37V can be adjusted

A, size: 77mmX28mmX30mm B, the main chip: LM317 C, operating voltage: 3V ~ 37V D, the maximum operating current of 1A E, features: 1, can be accessed by the AC voltage of 3V ~ 37V 2, which can be accessed DC 3V ~ 37V voltage 3, can be connected directly to the output end of the AC adapter 4, the output voltage can be adjusted [Vout <(1.25 ~ Vin)] 5, there are four mounting holes, can be fixed to the hole diameter of 3mm 6, the fins can be replaced