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Specification: 1. Working voltage: 3.3 V to 5 V DC 2. The working current, try to choose more than 1 a power supply 3. The working temperature: - 10 °C - 50 °C 4. Install the aperture: M3 screws 5. The detection distance: 1 mm and 60 cm adjustable, the closer distance performance more stable, white reflection furthest distance. 6. Control of plate size: 44 mm x 30 mm x 8.5 mm (length x width x height) Small board sensor (obstacle avoidance) forward 11 mm x 25 mm x 10 mm (length x width x height) Small plate sensor (tracking) 20 mm * 11 mm * 15 mm (length x width x height)