ME204R: This non-contact ultrasonic gas detector is specifically designed for measuring LPG tanks. Suitable for industrial applications. It features RF433 communication, an LED display, and barrier-free communication up to 300m, capable of penetrating three walls and measuring up to 1m/50kg. Tuya Ultrasonic Sensor is an outstanding technology that boasts numerous advantages for various applications. Its reliable distance detection capability, easy installation and use, high durability, versatility, and low maintenance costs. Model Number:ME204R Usage:Home Automation System Operating Temperatures:-20-70℃ APP:Tuya SmartLife (The product printed words may vary depending on the batch, but this does not affect use) Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. / EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC110V/AC100-240V Color:As Shown Material:ABS Package Contents: 1 * Tuya Gas Tank Meter 1 * adapter 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.