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 IC Working Temperature:-20~60℃ Color:Blue/Green Material:Metal Application:Electronic Circuit Size:68*35mm/2.68*1.38in Function: 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. Components and Parts Number Value Packaging Quantity PCB 1 NE555 Chip U1 NE555 DIP-8 1 CD4017 Chip U2 CD4017 DIP-16 1 IC Base 8P Straight Cutting 1 IC Base 16P Straight Cutting 1 Switch Button S1 6*6*5 Straight Cutting Black 1 XH2.54-2P Port J1 2P Straight White 1 Electrolytic Capacitor(50V/1UF) C1 1 UF 4*7mm 1 Ceramic Capacitor C2 104 0.1UF 1 Resistor R1 10M 1/4W 1 Resistor R2 3.3M 1/4W 1 Audion S8550 Q1,Q2 S8550 TO-92 2 Resistor R7 1K 1/4W 2 Resistor R11 4.7M 1/4W 2 Audion S8050 Q3,Q4,Q5 S8050 TO-92 3 Resistor R8,R9,R10 470R 1/4W 5 Red LED D2,D3,D4,D5,D6 Red 5MM 7 Resistor 5,R6,R12,R13,R14 10K 1/4W 10 Package List: 1*Electric Dice NE555 CD4017 DIY Set Note: As different computers display colors differently, the color of the actual item may vary slightly from the above images. .