German Quality. Powered by Tradition. Features: Efficient motor provides significant air force Optimized motor cooling system and dust-proof bearing provides longer lifetime 3-stage speed control for easier airflow adjustment Specifications: Voltage 20 V Rated no-load speed 11,000/15,000/18,000 rpm Air volume 1.6/2.2/2.8m3/min Battery capacity 4.0 Ah Charging time 2 hours Weight 1.3 kg Accessories: 1 Bowpipe, 1 Functional Accessories Set, 1 Battery pack and 1 Charger