Light source:UV LED Wavelength：365nm & 395nm Applicable environment: crude oil detection, exploration, banknote inspection, fluorescent reflection, identification Battery: 2*(AAA) No. 7 batteries Type-C Port on Torch: NO Size: 12.8cm (length) * 1.38cm (tube diameter) * 1.5cm (head) (about 10cm) Weight:26.1g (excluding batteries)