1.Can be expanded for yards up to 5 acres with the purchase of
additional wire/flag kits (sold separately). 2. Pulsed proportional stimulus. 3. Progressive tone stimulus. 4. Low battery consumption. 5. Speed detect anti-run through. 6. Audible and visual wire break alarm. 7. Variable field width control. 8. Quick disconnect terminals.9.Receiver: 6.5x3.9x 3.2cm.10.Transmiter: 15.8x3.4cm.