CHOE Qi wireless charger works with any Qi-enabled devices through a QI-compliant adapter or a QI-compliant embedded chip Power Source: AC Adaptor with micro USB port plugs into wireless charging pad The distance between wireless charging pad and receiver should not exceed 5mm/0.2 inch The input current should not be less than 1000mA to keep high energy efficiency Specifications: Input: DC 5V/1000mA to 2000mA Output: DC 5V 1000mA (MAX) Frequency: 100 to 200 KHz Wireless distance: < 5 mm Note: Original chargers could be reused on following phones(No otter case): Galaxy S3/s4/s5/note 2/note 3, Nexus 4/5/7, iPhone 4/5/5s/5c Original chargers could not be reused at following situations(2 Amps AC Adapter/Power Source needed): 1.Wireless charing with Droid Maxx, Droid Mini, LG G2, Nexus 4, Pentax WG-III camera, and other qi-enabled devices not mentioned here 2.Wireless charging with otter case/cover(not including wireless charging receiver case) QI Charging Devices compatibility list: 1.This Wireless Charger Pad works with fully QI-ENABLE devices -Nokia Lumia 920/928:QI charge built-in -HTC 8X, HTC Droid DNA, HTC Rzound, HTC Incredible 4G LTE: QI charge built-in -Moto Droid Maxx, Droid Mini:QI charge built-in -Google Nexus 4, Google Nexus 5, Google Nexus 7(2013):QI charge built-in -Pentax WG-III camera: QI charge built-in 2.It also works with device equipped with a Qi-compatible receiver: -Samsung Galaxy S5/ Note 3/S4/S3/Note 2 :QI wireless charge receiver required -iPhone 5C/5S/5/4/4S: External receiver required -Nokia 925, Nokia 720:QI wireless charge receiver required -Nokia 820: External receiver required 3.Packing details :Wireless charger ? 1 , USB cable ? 1 , User manual ? 1.