Trimble T7 USB I/O Boot Expand connectivity on the Trimble T7 tablet with this replacement USB I/O boot . Designed to replace the tablet’s I/O boot, it provides DC power input, dual USB 3.0 host ports, and a 3.5 mm audio/headset connection for connecting compatible peripherals and accessories in the field. Key Features Two USB 3.0 host ports for connecting compatible USB peripherals and accessories. Integrated DC power input provides connection for a compatible external power source. 3.5 mm audio/headset jack supports compatible audio devices. Compatible With Trimble T7 Tablet