The unit built-in LED bulb, the high energy conservation, the multi-transformations, the favorable environmental protection, the long life cycle  It provides the color temperatureofapprox.9500k corresponding to sunlight  The latest circuit technology provides best performance and functionality.  Compact and portable, the built-in lithium battery allows the Mini Handheld Cold Light Source to work more than 2 hours after being recharged.  We design and manufacture it for use either with a rigid or flexible endoscope  A particularly well conceived safety feature is the automatic switchover from main light source to the spare light source in case of light source failure.  Therefore the light source is always ready for emergency use and contributes to patient safety.   Technical Data Power supply: AC110/220V±10%, 50/60Hz Battery: Lithium battery Bulb: LED O SRAM bulb, approx.5W Safety standard: IEC601-1   Color temp.:approx.9,500 K Illumination: ≥140& 65292;000 Lx Life cycle of bulb:  approx.1,200 h Storage temp.: -15& 8451; to +50& 8451; Operating temp.: 0& 8451; to 45& 8451;    Relative humidity:30% to 90% Device type: I/B Light of flexible :φ27mm, L:145mm. N.W.: 0.25 kg Light of rigid endoscope :φ24mm, L:115mm. N.W.: 0.2 kg Connection: S TORZ, W OLF(optional), O LYMPUS A CMI etc.     * According to the test setup by the manufacturer, service life may be shorter when used under unfavorable conditions (e.g .many ON/OFF cycles) Packing List: 1. LED cold light source: 1 each 2. Rechargeable batteries: 2 each 3. Battery Charger: 1 each