The ALD-800R Assistive Listening Wireless Receiver from Nady is designed for use in the ALD-800 Assistive Listening System. It features 8 channels and can provide up to 130dB SPL of hearing assistance. It functions on DD band at 72.7 MHz. Any number of ALD-800R receivers can be used with a single transmitter (not included). The receivers are powered by a single 9-volt battery (not included) for up to 20 hours of operation. A pair of earbud earphones are included.