Before Purchasing, please check your computer or PC whether meets the following three requirements at the same time: 1.The computer or PC supports 4K. (You can use a software called CyberLink to test.) 2.The display resolution supports 4K. 3.The video player supports 4K. If any of the conditions above are not met, then the 4K optical drive will not be available. Read Speed (Max.) DVD-ROM Max 8X CAV CD-ROM Max 24X CAV BD-ROM 2.0X CLV (for Video)/ Max 6X CAV (for Data) Writing Speed (Max.) CD-R: Max 24X CAV CD-RW: 4X CLV High Speed CD-RW: 10X CLV Ultra Speed CD-RW: Max 16X Zone CLV DVD-R: Max 8X CAV DVD-R DL: Max 6X PCAV DVD-RW: Max 6X Zone CLV DVD+R: Max 8X CAV DVD+R DL: Max 6X PCAV DVD+RW: Max 8X Zone CLV DVD-RAM: 3X-5X PCAV (4.7GB) BD-R (SL/DL): Max 6X CAV BD-RE (SL/DL): 2XCLV BD-R (TL/QL): Max 4X PCAV BD-RE (TL): 2XCLV Energy-saving and Low-noise Operation No loud noise and low vibration when it’s running. It is powered by USB port, no external AC adapter required. Consume less power and save your electricity bill. Specifications Product Type: Combo of BD/ DVD/ CD Burner and BD/ DVD/ CD Player USB Interface: USB 3.0 Color: Silvery Output Voltage: 3-5V Thickness of Internal Part: 9.5mm Support Computers: Laptop, Desktop, Notebook Support Disc Types: VCD, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-R DL, DVD-RAM, DVD-RW, DVD+R, DVD+R DL, DVD+RW, BD-ROM, BD-R, BD-RE Package Contents Optical External Drive × 1 USB 3.0 Cable × 1 User Manual × 1 Warranty: Every TopElek product includes a 45 days money back & 18-month warranty. Please do feel free to contact us if you have any question!