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3V CR2032 Lithium Button Cell Battery

 25.00
Battery: CR2032 CR2032 Battery Voltage: 3V CR2032 Battery Chemistry: Lithium CR2032 Battery Capacity: 260 mAh CR2032 Battery Diameter: 20.0 mm (.78″)

4 CHANNEL 12V RELAY BOARD

 650.00
This 4 channel 12 V relay module is a low pull, high release relay module and features energization status indicator

4 channel 5v relay shield module, Four channel relay control board relay expansion board for UNO R3 mega 2560

 600.00
Description:This 5V 4 Relay Shield Module is a small current signal control power equipment commonly used electronic module, enabling high-power

4 Digit 7 Segment Display

 180.00
Specifications Attribute Value Display Type 7-Segment Number of Characters 4 LED Colours Green Number of Segments 7 Dominant Wavelength 573

4 Inch Woofer Speaker

 450.00
Specification Diameter of speaker : 4 inch (102mm) Impedance value : 4Ω (ohm) Power rating : 30W Shape : round