A3S A5S Build Volume 205*205*205mm (8.1x8.1x8.1in) 305x305x320mm (12x12x12.5in) Main Board MKS (open source Marlin) ARM-based 32bit STM32 Power Supply Built-in Power Supply Built-in Power Supply Resume Printing Function Yes Yes Filament Runout Sensor Yes Yes Thermal Runaway Protection Not Enabled Enabled Technical Specifications Layer Resolution 0.1mm Layer Thickness 0.05-0.3mm Stock Nozzle Diameter 0.4mm Nozzle Temp ≤245℃ Heated Bed Temp ≤110℃ Print Speed 10~120mm/s (suggested 60mm/s) Supported Print Materials PLA/ABS/TPU 1.75mm Hotbed Build Plate Black Diamond Glass Bed Positioning Accuracy X/Y: 0.012mm Z: 0.001mm Connectivity Working Mode USB Drive or USB Cable File Format STL, OBJ, G-code, AMF, DAE OS Compatibility Microsoft Windows, Mac OS, Linux Filament Runout Sensor, A3S will pause and save the printing from running out of filament during the printing process. Resume Printing Function, A3S will resume printing where the last print was stopped due to power shortage. Removable Glass Build Plate, ensures stronger adheresion and easy removal for finished prints.