Trakker DB7-R Reciever, PPS (Power-On Protection System) stops accidental power up and wasted battery Tough ABS weatherproofed case and battery compartment designed for the most demanding of conditions Digital circuitry and internal component weatherproofing Built-in SRT (Sync-Connect Receiver Technology) for long range and obstacle link signal optimisation Easily connect and update alarms, 4 per channel (16 total) Alarm tone and LED colour are automatically updated on receiver when adjusted on alarms Tru-tone cone speaker for loud frequency delivery D-Vibe vibration setting transmits pulses per bleep and in silent mode LER (Last Event Recall) indicates the last event sent to the receiver Indexed volume control wheel (8 volume settings, including silent) Low battery warning Self-standing case design Requires 1 x PP3 9V battery dB7-R Bite Alarm and 3-rod presentation sets are available separately Supplied with lanyard