Features:

• Chip:TM1638
• Rated Voltage:DC 12V
• Input Current:0.24A
• Using power CMOS process
• Display mode :10 segments 8 bits
• Scanning :(8 × 3bit)
• Brightness adjustment circuit (duty cycle 8 adjustable)
• A serial interface (CLK, STB, DIO)
• Oscillation mode: RC oscillator (450KHz + 5%) 
• Built-in power-on reset circuit
• Chip Footprint:SOP28
• With 8 keys
• Wiring:VCC GND connected to 5V power supply, STB CLK DIO connected to microcontroller IO port

Package List:

1x TM1638 Arduino and Raspberry Pi 2 / B+ Control Panel - 8 Bit Digital LED Module