The AKG WMS40 Mini Instrument wireless system is a UHF system with a PT 40 beltpack transmitter and an SR 40 receiver, designed for playing musical instruments without a cable. It is also suitable for singing or speech, and the transmitter accepts all microphones in the MicroMics series.

• Type: UHF wireless system
• Frequency: 662.300 MHz
• Transmitter: PT 40 beltpack
• Receiver: SR 40 with built-in antenna
• Battery life: Up to 30 hours with one 1.5 V AA battery
• Microphone compatibility: All microphones in the MicroMics series
• Indicators: ON/OFF, link, RF OK and AF clip
• Output: Adjustable, with a 1/4-inch jack connection
• Package contents: Power supply