Features:7 pcs of 5mm red LED electronic tweezers, kit based on NE555 oscillator circuit and circuit CD4017 counter display kit. You can simulate dice with the kit and get the fun of the game.100% brand new and high-quality.It is made of premium material,durable and has long service life.It can replace real dice and provides more fun while playing.Specification:Type:Logical ICWorking Temperature:-20~60Voltage:4.5~5VColor:Blue/GreenMaterial:MetalApplication:Electronic CircuitSize:68*35mm/2.68*1.38inFunction: When power is on, 7 LEDs will randomly display multiple points. The player presses the switches S1 and 7 to light the LEDs. After about 7 seconds, the LEDs will start to flash until the stable point is displayed. The entire first "trial" process ends.Circuit: The circuit is mainly composed of a pulse generator and a decimal counter circuit. The pulse generator and external components are made up of NE555 multivibrator. When you press S1, Q1 turns on, output pulse NE555 3 feet, then outputs CD4017 output high voltage. Different combinations of resistors and transistors can drive 7 LEDs to indicate the number of points. 1-6 points.Components and PartsNumberValuePackagingQuantityPCB1NE555 ChipU1NE555DIP-81CD4017 ChipU2CD4017DIP-161IC Base8PStraight Cutting1IC Base16PStraight Cutting1Switch ButtonS16*6*5Straight Cutting Black1XH2.54-2P PortJ12P StraightWhite1Electrolytic Capacitor(50V/1UF)C11 UF4*7mm1Ceramic CapacitorC21040.1UF1ResistorR110M1/4W1ResistorR23.3M1/4W1Audion S8550Q1,Q2S8550TO-922ResistorR71K1/4W2ResistorR114.7M1/4W2Audion S8050Q3,Q4,Q5S8050TO-923ResistorR8,R9,R10470R1/4W5Red LEDD2,D3,D4,D5,D6Red5MM7Resistor5,R6,R12,R13,R1410K1/4W10Package List:1*Electric Dice NE555 CD4017 DIY SetNote:As different computers display colors differently, the color of the actual item may vary slightly from the above images..