Ollieroo Bike Lock High Security Alloy Steel U Lock with LED Bike Headlight and Taillight, 2 Keys Brand:Ollieroo Ultra tough & durable bike lock with bright LED headlight, taillight; Compact design allowing to keep with your bike at all times Made of Alloy Steel, durable materials, strong for long-term use; pick, pull and drill resistant cylinder; vinyl coated to protect your bike from scratches;Easy to fit, requiring no tools Feature ultra B Cylinder---more secure, more convenient and smoother with a key safe program, easy to attach and disengage for your convenience Three AAA NON- rechargeable batteries for the Headlight and two AAA NON- rechargeable batteries for the taillight included