Features: 1. Precise time keeping, glow in dark, it can help you to see the time clearly even at night. 2. Come with an anti-skip rubber mat and split ring mount for easy installation on straight section of handlebar. 3. Mounts on straight section of handlebars with a stainless steel screw. 4. Made of aluminum alloy material with electroplating surface, corrosion resistant and glossy. 5. The clock dial is waterproof and shock resistant, very durable in using. Specifications: Material: Aluminum Alloy + Electroplating Surface Optional Color: White / Black Clock Size(Dia. x H): 4.2 x 2cm / 1.65'' x 0.79'' Fitment: For 7/8" 1" Handlebar(22mm, 25mm) Package List: 1 x Clock(Built in battery) 1 x Anti-skip Rubber Mat 1 x Allen Wrench Note: 1. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 2. Please check and confirm the size before purchasing. Thanks Package List 11. Precise time keeping, glow in dark, it can help you to see the time clearly even at night. 22. Come with an anti-skip rubber mat and split ring mount for easy installation on straight section of handlebar. 33. Mounts on straight section of handlebars with a stainless steel screw. 44. Made of aluminum alloy material with electroplating surface, corrosion resistant and glossy. 55. The clock dial is waterproof and shock resistant, very durable in using.