The Pro-Tracker Arrow Recovery System uses a specialized radio frequency with a signal emitter and receiver that is activated upon impact with game animals, allowing bowhunters to recover game day or night and in any weather. It tracks the game animal, not the arrow, by detaching from the arrow and staying in the hide of the animal. The tracker works with fixed-blade and mechanical broadheads, and the transmitter has a battery life of 18 to 20 hours and a range up to 2 miles. It uses the same basic technology as a radio tracking collar used with hunting dogs, and is not affected by weather or lighting conditions. MSRP: $449. Contact: www.pro-tracker.com