HCM MEDICA is professional in high power laparoscope light source, product is widely used in all kinds of endoscope and microscope applications, especially laparoscopy. This portable endoscope light source is 10W, very small, easy to carry, and it could be connected to rigid endoscope and flexible endoscope. Doctors could use it for both ENT diagnosis and operation, it will show you very clear image on the monitor if you use this product for throat operation. Parameters: 1.Power: 10w 2.Intensity: 245,000 Lux (tested with SHENDA4*175 0 degrees sinuscope) 3.Color temperature: 5000K - 6,500K 4.Bulb life: 20,000 HOURs(one year use guarantee for whole unity 5. Working time: HCM9703 - 3 hours (depends on the battery capaticity) HCM9704 - no time limit. 2 models: HCM9703: it works with 18650 Li battery. HCM9704: it works with DC adapter, mobile power banker, camera usb and computer usb, input voltage should be no more than 5v.