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HC SR501 PIR Sensor (Passive Infrared Sensor) + IR Proximity Sensor 12V 4020 Turbo Blower Cooling Fan 3D Printer ) 65 mm x 20 ) 65 mm x 20 mm x 12 mm (compact USB stick form factor) Weight ~15 g Origin Original Authentic Warranty 7 day warranty on manufacturing defects Support Email & WhatsApp 24 7 Key Features Purpose Built 3 Piece Design: Each heat sink is individually sized to match the exact footprint of the Raspberry Pi 4B's CPU Raspberry Pi Dual Sensor Combo: Covers both passive infrared (human motion) and active infrared (obstacle proximity) detection in a single kit
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