Specification： Model : PN-969 1. Input: Micro USB/DC 5V/2A 2. Output: DC5V 2.1A/1A 3. Built-in battery capacities: 3.7V/20000mAh 74wh 4. Battery Type: Li-polymer battery 5. Fully Charge: 8-14 hours 6. Working Temperature： -10°C to 45°C 7. Standby times: >5000hrs 8. Cycle life of charging: 500 times (1 time = from 0% to 100%) 9. Net Weight: 420g10. Size: 163*76*21mm Features: 1. New series black / white LED display. 2. Dual USB output. 3. Use lithium polymer battery make power bank thinnest. 4. Compatible for any phone, tablet, MP3, MP4, PSP, GPS, game device, camera and many more (just connect with your USB cable). 5. LED display (display battery percentage, in / out charging status). 6. Intelligent voltage recognition chip automatically detects the voltage. 7. Built in battery protection IC to prevent over charging, over discharging and short circuit.