Part of the ONE+ system of cordless tools for the home & garden, the Ryobi R18USB (Universal Serial Bus)-0 is a portable USB (Universal Serial Bus) adapter for charging your USB (Universal Serial Bus) devices anywhere, ideal for when you're on the go. The 2.1A & 1.0A ports provide fast charging to minimise charge time for your device. The R18USB (Universal Serial Bus)-0 is sold as a 'bare' tool (without a battery or charger) but is compatible with all batteries & chargers across the 18V ONE+ system.