Front Light 1 x Super-bright white LEDFits all 22.2-31.8mm round handlebarsUniversal bracket for horizontal or vertical alignment3 functions - Flash, Pulse, ConstantIPX3 shower proof protectionTool-free fitting with quick release bracketRequires 3 x AAA batteries (included)Brightness: 14 lumens Visibility: 180o Beam Distance: 800m Run Time: 40hrs Flash/Pulse, 20hrs Constant Weight: 74g Rear Light 2 x 0.5Watt Super-bright red LEDsFits all 22.2-31.8mm round seat postsUniversal bracket for horizontal or vertical alignment4 functions - Flash, Chase 1, Chase 2, ConstantIPX4 rain proof protectionTool-free fitting with quick release bracketRequires 2 x AAA batteries (included)Brightness: 4.5 lumens Visibility: 250o Beam Distance: 400m Run Time: 60hrs Flash/Chase, 30hrs Constant Low, 15hrs Constant High Weight: 51g