DIY Digital 24 Hour Clock Soldering Practice Kit (HH : MM : SS Display)Build your own digital clock with this do it yourself soldering kit includes all necessary components along with an illustrated assembly manual. The manual also covers soldering techniques and an overview of Integrated Circuits, Resistors, and Capacitors. Please note: hours are always displayed in 24 hour (military time) clock format. Features 3 modes: 24 hour clock, countdown timer, and stop watch Tactile buttons for easy setting and mode selection