WORKS:The new vibration hour meter for Generator Outboard Motor Dirtbike Compressor Lawn Mower Motorcycle Chainsaw ATV INSTALLATION:Easy installation,no battery and wire required,Double-Sided sticker fixed. FUNCTION:Hours,TMR,sensitivity choice,lock mode. UNIQUE:Completely waterproof IP67.Epoxy resin seal, water resistance, impact resistance, high temperature and high pressure resistance. WARRANTY:3 years warranty,aftersale service provided.