Features: DIY electronic clock kit with no battery straps and LED display, featuring assembly for 30minute setups using plastic metal hybrids components. High brightness LED screen ensures visibilitys in low light conditions, while silicone metal construction double longevitys compared to standard plastic models. for STEM educators, parent child bonding activity, and enthusiasts hands on electronics projects with educational value. Perfectly suits night joggers, camping, and classroom workshops where timekeeping and portable durability. Complete set includes pre programmed circuit board, LED module, and adjustable straps, enabling immediate functionality after simplifieds plugs and play installation. Specifications: Material: Silicone + Metal + Plastic + Ceramic + Circuit Board Size: 4.5x26cm/1.77x10.24inch Color: Blue/Red/Pink/Black/Lake Blue(optional) Package Includes: 1Set DIY Electronic Watch Kit note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.