Fangrui Product Details Using 32-bit High-speed Arm Chip As The Main Control Chip Stm32f407, The Main Frequency Is Up To 168mhz, Compared With The 2560 (16mhz), The Data Processing Capacity Is Faster; Using High-quality Mosfet Tube, The Heat Dissipation Effect Is Better; Using A Dedicated Power Supply, The Chip Supports 12-24v Power Input, The Same System Power Supply Can Reduce The Hot Bed Current To 1/4, Which Effectively Solves The Problem Of Mos Tube Heating; Industrial-grade Chipset, Printing Is More Accurate And Faster, With Over-current Protection, Overload Protection, Over-temperature Protection, Over-temperature Alarm And Other Safety Functions (automatically Turn Off The Heating Switch); Support Offline Upgrade Function, Copy The Upgrade File To The Memory Card, Insert A 3d Printer To Complete The Program Upgrade; Specifications: Input Voltage: 8-35v Motor Driver: Tmc2208 Sensor Type: 100k Thermal Resistance Firmware Update: Support Offline Upgrade Function Connection Mode: Online/offline Printing Resume Printing: Ye