Wireless Chargers, also known as Inductive Chargers, allow you to charge your smartphone without the use of any cables. You simply place your compatible smatphone onto the wireless charger to begin the charging process. The Wireless Charger does need to be plugged into a power source.

Devices that have built in wireless charging capability.

Apple iphone: 8, 8 Plus, X, XS, XS MAX, XR

Samsung Galaxy: S9, S9+, Note 8, S8, S8+,S7, S7 Edge, Note 5, S6, S6 Edge

LG: V30, G6 (US), G4, G3

Google Nexus: 4,5,6,7 (2013)

Blackberry: Priv

Huawei: Porsche Design Mate RS

In most cases Yes. The Wireless Power Consortium states that QI wireless charging detects your devices at up to 45mm. This means that even with a thick phone case your QI enabled smartphone will still charge. However be advised that this may not be the case when using a phone case made from metal.

Yes they are very safe to use. The electromagenetic field generated by Wireless Chargers only generates a small ammount of power and only operate over a short distance.