![Amazon.com: Alto Professional Stealth MKII-UHF Stereo Wireless Audio System for Active Speakers with Transmitter and 2 Receivers, 2 XLR Ins, Expandable : Musical Instruments Amazon.com: Alto Professional Stealth MKII-UHF Stereo Wireless Audio System for Active Speakers with Transmitter and 2 Receivers, 2 XLR Ins, Expandable : Musical Instruments](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/71wRSEzv1gL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Alto Professional Stealth MKII-UHF Stereo Wireless Audio System for Active Speakers with Transmitter and 2 Receivers, 2 XLR Ins, Expandable : Musical Instruments
![Amazon.com: Alto Professional Expansion Pack for Stealth Wireless MKII - Single Channel UHF Wireless Receiver for Active Speakers : Everything Else Amazon.com: Alto Professional Expansion Pack for Stealth Wireless MKII - Single Channel UHF Wireless Receiver for Active Speakers : Everything Else](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/819Iew8ocQL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Alto Professional Expansion Pack for Stealth Wireless MKII - Single Channel UHF Wireless Receiver for Active Speakers : Everything Else
![Alto Professional Stealth Pro 200' Range UHF 2-Channel Wireless Audio System For Active Speakers | Full Compass Systems Alto Professional Stealth Pro 200' Range UHF 2-Channel Wireless Audio System For Active Speakers | Full Compass Systems](https://www.fullcompass.com/common/products/original/388173.jpg)