One of Listen's most sophisticated receivers, the LR-500 Programmable
Display Receiver offers the signature Look&Listen LCD Display that
shows programming status, channel, lock, battery level, and RF signal
strength. Channel selector buttons are easily accessible on the front
of the unit. It has channel SEEK capability and is compatible with mono
or stereo headsets. It takes AA batteries* (alkaline or NiMH rechargeable).
SmartCharge capabilities prevent overcharging. It's easy to use, easy
to program. (Available in 72 or 216 MHz.)