5 in 1 Ambient Temperature Tachometer Morfayer Locomotive Intelligent Multi-function Tachometer1. Use high quality electronic components to ensure accurate monitoring data 2. Made of PC material, using touch type setting buttons. Long press the button to switch functions, and the function icons are intuitive and clear. 3. Four in one ambient temperature meter: (time ambient temperature voltage stopwatch) 4. Four in one water temperature meter: (time water temperature voltage stopwatch) 5. Five in one ambient temperature tachometer: (tachometer