Full&Love 5LED Cap Light Hat Lamp Head Light Headlight Headlamp with Clip-On Switch Button for Outdoor Sport Hunting Fishing Hiking Camping Mountain Climbing Climb Mountain Night Walking Riding Repairing Electric Circuit (1pcs Black) Qty LED: 5;Power By: 2 lithium coin cell batteries Demensions: 3.35 x 1.97 x 0.79inch/8.5 x 5 x 2cm(L x W x H) LED life lasts for over 100000 hours, no consideration for changing light Can clamp on the brim, meet the need of cap and illumination.Strengthened the design of water proof. Can be used in mountain climbing, fishing, campimg in open air, night walking, riding, repairing electric circuit, etc.