Optimal Performance: This set includes 10 ultrasonic probes, each designed for precise transmission and reception. Operating at dual frequencies of 25kHz, these probes versatile applications and enhanced sensitivity. Construction: Encased in a robust black plastic shell, these ultrasonic probes are engineered for durability and long-lasting use in various environments. High Sensitivity: The high sensitivity of these sensors makes them ideal for a range of ultrasonic applications, including distance sensing, object detection, and more, ensuring reliable and accurate results. Colour:Black Material:Plastic Package Contents: 10 x Ultrasonic transmitters 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.