Material:aluminium alloy + tpe technology:cnc working temperature: -25°c to +45 °c interface: usb 3.0 external interfaces*1, sd*1, microsd*1, audio interface*1, hdmi*1, type-c usb*1 usb 3.0 external interface: compatible with usb 3.1 gen1 5 gbps speed transmission (downward compatible with usb 2.0 and usb 1.1) sd/microsd: compatible with sd, microsd, sdhc, sdxc and other memory cards, support capacity up to 2tb audio interface: compatible with 3.5mm audio interface audio output hdmi: compatible with hdmi 4k/30hz video output, supporting hdcp1.4/2.2 usb-c pd: support 5v/9v/14.5v/20v 4.3a (max)