your for S9 operates at performance with our replacement cliff sensors. This essential for preventing your vacuum from falling off stairs and ledges. Manufactured with precision, these parts maintain the and efficiency of your device. Easy to install and designed specifically for S9 model, these accessories are perfect for maintaining your robot vacuum's functionality and prolonging its life. Keep your vacuum navigating smoothly and safely with these essential sensors. Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Colour:As Shown Material:ABS Package Contents: 1Set * Cliff Sensor Accessories 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.