Threeinone electronics kit What you get Circuit board kit: supply voltage 3V4.5V. LED quantity: 10. DIY water lamp kit: electronic production. DIY electronic parts. Solder practice PCB: NE555CD4017 water lamp. 3C digital accessories. Key benefits Safe lowvoltage operation: designed to run on 3 to 4.5 volts for hobby use and testing. Bright, visible LED display: 10 LEDs provide a clear display for learning and projects. Handson learning: ideal for practicing soldering, circuit assembly, and basic timer concepts. Timed LED sequencing: the solder practice PCB uses NE555 and CD4017 to demonstrate timing and sequencing in a water lamp project. Includes digital accessories: 3C digital accessories to support basic digital electronics work. Compatible use cases Education and selfstudy: for beginners and students to learn circuit assembly, soldering, and simple timer circuits. DIY decor and projects: build a small water lamp and observe LED behavior in a lowvoltage setup. Hobbyist solder practice: use the NE555CD4017 board to refine soldering technique and understand timing circuits. Notes All items are provided in a 3piece kit format with the specifications and functions listed above. No additional components or power sources are included beyond what is specified.