Specification model:

British Standard head 3-bit. 1 square meter 2 m nude

European standard head 3-bit 0.75 square meters 1.8 m.

Multi-switch European standard head 3-bit 0.75 square meters 1.8 M..

European standard head 4-bit 0.75 square meters 1.8 M

European standard head 5-bit 0.75 square meters 1.8 m,