Supports simultaneous charging of up to 4 mobile devices. Good for energy saving. The material is fire-proof and good for high temperature. Compatible with smartphones, tablets, and other USB devices.4-Ports USB Auto-ID with LED touch lamp, Intelligent identification, wide voltage adaptation, multiple protectionFeatures: 1. With LED light button switch,you can charge your devices at dark environment and without turn on the light. 2. 4 USB Ports design,you can charge more different digital devices in a same time,like smartphone,iPad,home appliances etc. 3. Lightweight and easy carry,especially for daily travel or business trip or use for home and office,save room and elegant. 4. High efficiency,low energy consumption,circuit protection,provides a safe charging performance.