Shure QLXD24/B58-X52 QLX-D Series Single-Channel Digital Wireless Microphone System with Beta 58A Handheld X52 (902 MHz 928 MHz) - Pro AV Warehouse
Amazon.com: Shure GLXD24+/B58 Dual Band Pro Digital Wireless Microphone System for Church, Karaoke, Vocals - 12-Hour Battery Life, 100 ft Range | BETA 58A Handheld Vocal Mic, Single Channel Receiver : Everything Else
Shure BLX288/B58 Dual Beta 58 Wireless Handheld Microphone System