The usage mode of this product is on/off mode. Dimension: 90mm (Length) x 15mm(head) x 15mm (Tail). Use AAA batteries to power the flashlight, the product can work continuously for 1~1.5 hours with a full battery charge. The package comes with 1 AAA battery, when the battery is low, you need to buy additional batteries to replace. The product is very small and portable, with a net weight of only 20g, making it ideal for you to carry around. The body shell is made of aluminum alloy, strong and wear-resistant, good heat dissipation, which greatly increases the service life of the flashlight. Using high quality UV lamp beads, 3W output power, suitable for banknote inspection, pet urine detection, mineral detection. Not suitable for resin curing (because the power is smaller and takes a long time).