1. Working voltage: 12 ~ 28V (rated 24 V) 2. Shell material: ABS engineering plastic 3. Overall dimension: 118h * 120mm 4. Working temperature: - 20 ℃ - 60 ℃ 5. Color indication: Red / Green / blue (8 three color LEDs) 6. Communication mode: RS485@9600bps 7. Installation height: 1.8 ~ 3.0m (2.5m recommended) 8. Horizontal distance: within 4.5 m ahead of wheel positioner