Wireless 802.11ac for Fast data transfers</br>SD 3.0 card reader for Fast media offloads</br>All-day battery (up to 10 hours)</br>USB power bank to charge mobile devices</br>USB 3.0 for super-fast transfers</br></br>Product Description</br></br>Wd 4Tb My Passport Wireless Pro Portable External Hard Drive - Wi-Fi Usb 3.0 - Wdbsmt0040Bbk-Nesn</br>