The ESR Tidal Wireless Charger offers fast wireless charging, with Safe Stay-Cool design and stable charging and advanced built-in cooling system + metal frame help better heat dissipation. Foreign Object Recognition automatically detects your wirelessly chargeable device and shuts off when foreign metal objects are detected. Easy and sleep-friendly: Simply place your smartphone on the charger to start charging, the LED light will illuminate for 60 seconds then automatically turns off while charging continues. Compatible with any Qi enabled device, iPhone and Samsung.