Product Description: Speed Adjustment Technology:Intelligent detection of media type. Error-free reading of all media types, increases life of drive.Double OPC Technology:Provides reliable, zero-error recording.Tilt Actuator Compensation Technology:Improves recording capability on deformed media.Magic Speed:Enables flexibility of drive operation, low noise mode, high-speed mode.Buffer Under Run Free Technology:Prevents Buffer Under Run error, enabling high-speed writing of media.Weight Balance System Technology:Mechanically designed for minimal vibration and noise.Eco-Product:Minimum usage of environmentally harmful materials for green environmentSamsung DVD Writer is able to write on Double Layer DVD, which consists with 2 writable layers. Which means you can write up to 8.5GB.