EPtech USB Y Charger+Data Cable Cord Lead For Garmin GPS Nuvi 3597/LM/T 2577/LT 2577LMT Brand New, High Quality USB 2.0 Data/Lead and Power Supply Cable Connectors: one end with USB mini B male, the other end with 2 USB A male---one for strengthening power supply and one for data transfer. 2-in-1 feature: depending on your device's specifications, this cable connects your external hard drive/external HDD to a USB-ready notebook/laptop or USB hub for powering the device and transferring data. This is especially important for HDD with big capacity, since without the additional power, the HDD may malfunction or lead to connection frozen. Warranty:1 year warranty, 30 day money back guarantee Shipping from USA !