Wall Charger 5Vdc 200mA USB Output USB Adapter Our low-profile adapter plugs right into the wall (well, into a standard electrical outlet in the wall) and puts out 5VDC at 200mA through a standard USB port. Measures 2-1/4" x 1-7/8" x 15/16", plus the prongs. No charge indicator or circuitry, so check those charging appliances regularly. Handy and cheap.