1. Input voltage: DC 5V 2A 2. Output voltage: DC 1.2V 3. Protection function: overcharge protection 4. Applicable batteries: AA / AAA rechargeable batteries 5. Safe fast charging, maintain constant voltage charging, safe and efficient standard current charging 6. Independent channel, any mixed charging, suitable for AA / AAA rechargeable batteries, 4-slot arbitrary charging, 1 section can also be charged 7. USB four-slot rapid charger, full of automatic trickle output small current charging, prolong battery life 8. Ni-MH battery charger, USB portable charging, as long as there is a USB port place can be charged 9. LED light indicator, no battery or abnormal LED light does not light, red light when charging, full of red light is on constantly 10. Size: about 8.3 x 1.9 x 6.3 cm