Make charging a snap with this custom magnetic wireless charger and the included 10W USB Power Adapter. Compatible with Roam 2, Roam, and Roam SL Magnets in the charging pad for quick hands-free attachment Can be used while the speaker is oriented vertically or horizontally Rated IP54 (resistant to dust and liquid splashes) Charges from 0% to 50% in two hours Power supply input: 5 VDC, 2.1A (10.2 W) Power supply output: 5 W Operating temperature: 32°F to 104°F (0°C to 40°C) Cable length: 3.9 ft (1.2 m) Weight: 0.26 lb (0.12 kg)