4 x AA Battery Holder With USB 5 Volt DC Output

4 x AA Battery Holder With USB 5 Volt DC OutputThis battery holder is designed to charge or power USB devices.It’s great for recharging or powering MP3 players,Arduino’s,cameras, etc “off the grid”. This device does not work with Apple products.Perfect for long plane, train orcar trips.Holds 4 x AA Batteries.Dimensions: 3-1/4″ (L) x 2-1/2″ (W) x 3/4″ (D)Features:5 Volt DC USB Power Outlet On/Off Switch Belt ClipVellemanBH341USB