This Contact Cleaner Spray for Cellphone Maintenance and Repair is a special combination of cleaner, lubricants and protective agent cleans, lubricating and protecting all kinds of mechanical and electrical parts. It helps to improve electrical conductivity and reduce friction and wear, definitely a must have for cellphone maintenance and repair. Made of high-grade material, it is moisture, rust and corrosion proof and thus is safe and reliable. Oily type and dry type satisfy your specific needs.