The WMS 40 Mini instrumental systems features AKG's unique HDAP (High Definition Audio Performance) technology ensures the best possible, most realistic sound at any time. The system includes an SR 40 MINI receiver, a PT 40 MINI pocket transmitter, a MKG L instrument cable, a universal power supply with US/UK/EU adapter, and one AA size dry battery.

The SR 40 Mini receiver provides three status LEDs indicating ON/OFF status, received signal strength (RF OK), and audio clipping (AF CLIP). The VOLUME control sets the level at the ¼" output jack. The supplied switched mode power supply operates on any AC voltage from 110 to 240 VAC and includes EU, UK, and US adapters. 

The PT 40 Mini bodypack is probably the smallest and lightest transmitter in its class. A reliable mini XLR output allows you to connect every compatible AKG miniature microphone. A single AA size battery will do to power both the transmitter and a condenser microphone connected to it. Battery life of the transmitter is the same legendary "30 hours off a single AA battery" as for the WMS 40 models, reducing the need to replace batteries and thus saving real money in the long run.