Features: brand new and high quality Adopt voltage comparator LM393 chip, which can detect power failure sensitively. Equipped with 9 2.7V 5 F supercapacitors to store electricity, so that there is sufficient power supply after detecting the power failure, then the printer can successfully complete the corresponding operation. An anti-reverse for protection circuit is added at the power interface to prevent irreversible damage caused by the reverse power supply, which greatly protects the circuit board. The module is small and easy to install. Super Compatibility: for most 3D printer motherboards on the market (For example SKR for PRO V1.1/SKR V1.3/SKR MINI E3 V1.2). Specifications: Main function: realize the power off resume print function External dimension: approx. 52.53x50mm/2.7x1.97in Power input: DC24V Logic voltage:3.3V or 5V Support model:All for DC 24V powered 3D printers are available(like Ender3) Module Power-on: After BTT UPS 24V V1.0 power on, for D2 red light in the lower-left corner will continue, indicating normal power supply. Colour:Photo Color Material:ABS Package Includes: 1 x 3D Printer Parts 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.