Combining the BT-821's Bluetooth wireless technology with a Bluetooth enabled devices such as Smartphones, PDA¡¦s or laptops which support Serial Port Protocol SPP (regardless of their operating system) and your favorite navigation software (street, topo, ocean, aviation), you can create a sophisticated navigation system at a fraction of the cost of larger dedicated navigation units.
The BT-821 offers up to 23 hours of continuous use from a single charge, making it the ideal GPS for extended navigation trips, whether on the road or on the trail. Battery usage is substantially increased by having a built-in auto shut-off feature that powers off the BT-821 after 10-minutes of no active connectivity with the host device. Should the BT-821 ever be accidentally left on when exiting a vehicle, or within a backpack, the auto shut-off feature will power-off the GPS receiver to conserve battery resources.
The BT-821 comes complete with a 12VDC cigarette lighter adapter for in-vehicle charging. The a sleek, compact design of the BT-821 makes it easy to carry in a pocket, purse, backpack or even on a belt when using the optional carrying case.