Crimson Trace Lightguard for Smith & Wesson M&P Full-Size: * Platform: Lightguard * Attachment: trigger guard attachment * Activation location: front activation * Material: polymer * Installation: user installed * Battery type: 1 CR2 lithium battery * Master on/off switch: yes * Warranty: 3-year full warranty * Light specs: 100 lumen LED * Model# CRMLTG760