Our propane leak detector for your RV lets you know the moment there's a problem so you can fix it right away. Sensitive and Advanced Sensor: RV propane detector is designed, providing more reliable protection . Real-time Digital Display: This RV propane alarm features a digital screen that clearly displays real-time propane values (%LEL), so you'll know when to react and fix the problem. 85dB Audible Alarm: When the propane value exceeds 5% LEL (default), our propane gas detector sound an alarm loud enough to a quick response even when sleeping or outdoors. There's also a test/mute button that lets you test and mute unnecessary trigger functions. The printed words are random, and the specified words are not accepted, which not affect the use Color: White Material: plastic Package Contents: 1 x RV Propane Gas Detector 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.