4w portable handheld led cold light source 400lm metal fit for endoscope

specifications: color: silver power: 4w (max) luminous flux: 400lm material: metal + electronic components + led lights battery charger input voltage: ac100 - 240v, 50 / 60hz battery charger output voltage: dc3.7v - 450ma plug: us plug product size: 9 * 2.5 * 2.5cm screw diameter: 1.2cm, charger size: 10 * 4 * 3cm packing list: 1 x portable handheld led cold light source (not including endoscope) 1 x 14500 battery (built-in) 1 x battery charger