The GR-903 can function as a standalone Bluetooth GPS receiver; however, it does not have a built-in battery. It needs to be connected to a USB power source, such as a computer's USB port or a USB portable charger/power bank, to operate.
The GR-903 can function as a standalone Bluetooth GPS receiver; however, it does not have a built-in battery. It needs to be connected to a USB power source, such as a computer's USB port or a USB portable charger/power bank, to operate.
