... Included) conveniently.7) Built-in battery testes button with battery level LED indicator.8) Power ON/OFF ... button to save battery when not in use.Compatible with: Cell Phone ( Such as Blackberry, Nokia,Samsung, Blackberry, ... Nokia, Samsung, Motorola, LG, Sony Ericsson),, and MP3 with USB ... to DC male cable Charger Station for iPad,iPhone 4S,iPod