Check the listing for details. Tactical APL-C Light Constant/Momentary/Strobe LED White Light. Condition: New. Listed at 41.61 USD. Color: Black / Dark EarthLength：61.70mmWidth: 28.10mmGross Weight: 170gWeight: 40gMount: Integrats with all Glock railsMax Output: 200 lumensBezel Diameter: 22.35mmFunction: Constant/Momentary/StrobeActivation: Ambidextrous on/offRuntime: High efficiency LED provides up to 1.5 hoursLock System: Head rotationBattery type: 1 x CR2 (not included)Construction: Glass reinforced polymer body offers high impact resistance and durability Features:Operation(either left or right button) :Constant: Click the back button Momentary: Click the back button for 3 to 5 seconds, change between constant mode and momentary modeStrobe: At constant mode then double Click the back button, (when at the momentary mode, it can not change to strobe mode) SHIPPING:-The shipment usually takes(via SpeedPAK for free )-7-20 days to USA, Canada, UK or Asian Countries. 10-25 days to Euro Countries (excluding Italy and Russia) 18-28 days to Italy, Russia, South American Countries and African Countries. RETURNS: -We stand behind every product we sell. If you're not pleased with your purchase, we'll be happy to make an exchange or refund the product price less S&H within 14 days of your purchase. -For any exchange or refund, we need the original receipt or a record of the purchase in our system, and the product must be in its original condition, including the box, UPC bar code, packaging, and all accessories. -Please allow up to 15 business days for returns to be processed.-Shipping and handling charges are not refundable.