This Sony DRX-840U external DVD/CD RW Drive Burner comes with a power cable and has been tested to ensure it works perfectly. It is compatible with a range of devices via its USB interface and can write to DVD+R Dual Layer formats at a speed of 20x. The silver color gives it a sleek and modern look, making it a great addition to any tech setup. It is a reliable and efficient choice for those in need of an external drive, and its brand name ensures quality and durability.