Three type of power supply can be chosen: Type A: Li-battery power MODEL: TD-028AA(5W)/ TD-028AB(7W) Type B: AC110-240V power MODEL: TD-028BA(5W)/ TD-028BB(7W) Type C: AC24V power(Build-in) MODEL: TD-028CA(5W)/ TD-028CB(7W) The high power LED Curing light has humanity intelligent chip, with a high intensity LED light and Li-on rechargeable battery. This device can cure all the dental resin known in the market nowadays; With a performance level far superior than the halogen curing light's. Advantages: Unique elbow design. Original imported big power LED, two types of power: 5W 7W. Very convenient to operate. Small size, cordless and light weighted. No dazzling strong light which allows you to aim the light to the exact position and Improve the effectiveness of the treatment. High articulation optical fiber. Automatic inactive, automatic power off. Membrane pushbutton, soft feel. High power reachable battery. High powerful Light intensity with a maximum reach of 2000mW/cm2. 3 different working modes: Default mode- works 20 seconds and automatically shuts down. Gradually shinning mode- The light of the LED will increase during the first 12 seconds of operations. Gleam shining mode- Generate plus light. Can be used anywhere in the world. The voltage input is 110V-240V and we will provide you with the correct adapter for your country. Technical Parameters: Light intensity: 5W: e1400mW/cm2; 7W: e1700mW/cm2 Spectrum range: 450nm - 480nm Power adapter: AC 110 - 230 V / 50 - 60 Hz Digitai LED display: 10S20S30S40S Solidification time and depth: 10s: 2-3mm Output power adjustment: 50%70%90%100% Charging time: About 3 hours What are in the box: 1 X LED Curing light device 1 X High capacity rechargeable battery 1 X Charger 1 X Charger socket 1 X English operation manual. Model: TD-028AA Company: Tree Dental One-Stop Purchasing Service