The electro fusion control units of type Tiny Data MF USB (Bluetooth) and poly control plus USB (Bluetooth) V2.0 are solely meant for the welding of thermoplastic pipes (e.g. mode of PE-HD, PE80, PE100, or PP) when used with electro fusion fittings that have an input voltage of less than 48 V. These devices are conforming to the standards DVS 2208-1 and ISO 12176-2, of which the applicable standards for the electro fusion fittings to be used are derived from