Shure GLXD24/B58 Digital Handheld Wireless System (2.4 GHz) – ABC karaoke
Amazon.co.jp: SHURE GLX-D2+/BETA 58A Handheld Transmitter, Single Item, Replacement, Addition, 2.4 GHz, Easy and Stable Connection, Up to 17 Hours of Continuous Use, Up to 136.0 ft (60 m), GLX-D+, Digital Wireless
Amazon.com: Shure GLXD4+ Pro Digital Wireless Single Channel Receiver, Dual Band (operates in 2.4GHz and 5.8Hz), 100 ft Range - for use with GLX-D+ Dual Band Wireless Systems (Transmitter Sold Separately) :