Features:Main chip: LM393 Working voltage: for DC 5V Single channel signal output Low level output signal used for human body touch sensor alarm Adjustable sensitivity With fixed bolt hole for easy installation Works with Official for arduino Boards Forum link: facebook.com/123Neonado Material: PCB + Brass Dimensions: 43 x 16 x 15 mm / 1.69 x 0.63 x 0.59 inch Weight: 3 g / 0.11 oz Color: Black + blue