Built-in magnetic,2-in-1 installing without any tools Elegant Aluminium alloy shell with magnet inside,easy install in 2 ways WAY 1:Free adsorb on any ironwork surface,e.g refrigerator,barbecue or inside the gun safe WAY 2:Stick on any non-ironwork,clean surfaces with the included metal strip &double-sided tape Portable,freely exchange places per your desires | Built-in 1000 mAh USB Rechargeable Battery With the built-in rechargeable battery operated(High-capacity 1000mAh),No need AAA batteries,Save cost for the next 2 years.Could be recharged by any 5V USB devices(like USB Adapter,power bank,laptop) Indicator light for Charging: "Red", means charging,"Green",means fully charged and ready to use.Please fully charge before using for the first time | Auto Motion & light sensor feature A three option switch which you can switch between auto sensing mode or manual mode per your desire.when switch to option G,means motion sensing and photocell functionality are available,it will auto light up when body movements are detected(sensing range: within 3M/10ft,120 degree angle.) only in the dark or at night.(Won't light in the daytime);Option ON/OFF means it is control to light manually,like a flashlight,no motion&light sensor feature |