P64a Micro Steam Engine/Puffer Sound Single-Cylinder Version ACTion Electronics®

A really small unit to produce a single-cylinder steam engine sound. Adjustable of puffing rate and volume. 1 Watt output. Plugs into the receiver; 'straight-through' connection to the speed controller; both receive their power from the receiver battery. 45.5mm x 32mm x 20mm. Weight 24g. Suitable micro-speakers available.