Auto repeats all Sherlotronics' code hopping transmitters
Transmitting range: 1.5km Line-of-sight
Receiving range: 800m Line-of-sight
'System alive' test every 4 hours
'Low battery' signal when unit drops below 10V
Capable of operating reliably at 8V 
'Signal mask' feature when 5 signals are received within 30 seconds from the same transmitter. The mask will be active for 1 min to prevent excessive noise on the frequency 
'Low battery' & 'system alive' can be programmed into the mimic base unit for monitoring purposes