AKG WMS40 Mini Vocal Set The AKG WMS40 Mini Vocal Set delivers crystal-clear audio performance in an ultra-portable design. Perfect for small venues, this system is ready to go with no complicated setup†just plug it in and you're up and running. It features an impressive 30 hours of continuous use with a single AA battery, offering long-lasting reliability. With new frequency options and a dual-band version for more flexible operation, this system is designed to meet the needs of a variety of spaces, from gyms to hotels to small clubs. It comes with a universal switched-mode power supply, ensuring compatibility for international use. Features: 30 hours of battery life with a single AA battery Universal switched-mode power supply for worldwide use New frequency options: US25A (537.500 MHz), US25B (537.900 MHz), US25C (539.300 MHz), US25D (540.400 MHz) Dual-band version available for combined frequency bands US25A/C and US25B/D Plug-and-play operation for easy setup Reliable performance for small stages, clubs, places of worship, gyms, and hotels Lightweight design ideal for portable use