Ultra-Low profile speaker with plastic basket and plastic diaphragm
Ballanced frequency response and good voice reproduction.  Ideal speaker for the model field. Very well sutied for outdoor applications (e.g. sounds in station buildings).

Spezial Attributes:
- Plastic: ABS (basket; UL 94: HB); Mylar (diapraghm)
- Functionally at cold according to EN 60068-2-1/EN 50155


Specifications:
Diameter: 1 7/16"
Mounting rim: 1 7/16"
Height: 1/4"
Rated power 1 W
Maximum power 2 W
Nominal impedance Z 8 Ohm
Frequency response 300–20000 Hz
Mean sound pressure level 77 dB (1 W/1 m)
Opening angle (-6 dB) 180°/4000 Hz
Excursion limit +/−0.5 mm
Resonance frequency fs 550 Hz
Height of front pole-plate 2 mm
Voice coil diameter 10 mm
Height of winding 2 mm
Cutout diameter 31 mm
Net weight 0.006 kg
Protective system: IP 65
Temperature range −40 ... 158 °F

This speaker is made in Germany by the German manufacturer Visaton, a company that I personally know for more than 30 years. I build my first studio speakers with speakers from Visaton and they lasted for 15 years until I sold them - and they probably perform still today. So it is no surprise, when entering into the garden railroad sounds, I found Visaton again - and they are great!