RUIMX Potable Waterproof LED Flashlight with USB Power Bank and Self Defense Folding Knife for Outdoor Camping Hiking Hunting and Emergency Using USB Cable + 18650 Battery Attached ABOUT LOCK: this camping knife is using Friction Folder Lock, no lock button and not design using for heavy work. But for daily normal use is enough. Most of the time we use knife to cutting something but not stab something. So in this way the friction folder lock is enough and safe. Battery Type:18650 Li-ion(Included). 1*USB charging Cable and 1*18650 Charger Included New Design LED Flashlight with Power Bank Function. 3 Modes: High, Low, Strobe, Case material:Durable aircraft-grade aluminum,Special Design with Self Defense Knife and Waterproof Cover Suitable for outdoor Hiking, hunting, camping, biking and indoor activities. Perfect as gift for family and friends.