Fan blower with electronic speed regulator for performing experiments in aerodynamics, 
continuously variable flow velocity 0... max. 15 m/s, 
on/off switch, 
12 V DC power supply connected by means of two 4 mm safety jacks 
or 2.5 mm hollow jack for mains transformer 12 V / 10 A P3130-2Q, 
powder-coated aluminium housing with grating to allow airflow at both ends, 
with special NTL profile for attachment to rail with slots, 
support rod D=10mm, L=80 mm
Dimensions: 170x80x80 mm (excluding support rod)