1. Waterproo,With RS232. 2. Rechargeable battery,adaptor 3. Stainless stee&ABS version 4. Calibration with gravity adjustmen About us:We are a leading corporation in China which is specialized in electronic scales including electronic kitchen scale.bathroom scale,solar scale,body fat analyzer,weighing scale,bench scale,indicators and floor scale etc.Specifications: ModelW30W30SConverter A/D24 ...