1. MAX30105 is an integrated particle detection module that integrates internal LED photodetectors and optical components, with 2. and high , low-noise electronic circuits with ambient light control, and reliable motion artifact suppression. Simplify the design process for fire alarm smoke detection applications. 3. Thanks to the extremely small size, it can also be used as a smoke detection sensor for mobile and wearable devices. Working voltage: DC5V Working temperature: 40C 85C Communication interface: IIC With two M3 mounting holes Colour:Purple Material:plastic Size: 10 x 10 x 5cm Module size: 24.6X14.5mm Package Contents: 1 x sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.