[characteristics]1. This is a Portable mini Pen cap light that uses 1 AAA battery (not included). Body drip grain design, beautiful and generous.2. First gear, the core circuit adopts Boost constant current chip, constant brightness3. Tail key switch, comfortable to touch4. Two-way clip design can be used as pen clip and cap clip for different occasions.[Technical parameters]Led life: 100,000 hours Maximum Product Brightness: 120 Lumens Product Effective Range: 80 m Input voltage: 0.8-3.7vControl mode: 1 speed (Highlight)Chip specifications: constant current / constant brightness chipBattery used: 1 * AAA / 10440 lithium battery Service life: battery capacity depends Product size: 9x1.5cm Weight (grams): 18g (without battery)Switch mode: tail pressure switchHousing material: aluminum alloyLens material: Optical lens Surface treatment: hard anodized wear treatment Waterproof class: ipx6 Drop protection height: 3 mProduct color: black