This product is either discontinued or we cannot get that from suppliers.
Battery type: Rechargeable lithium-ion pack; user replaceable, Battery life: 20-40 hours, Range: 7km, Interface: USB, Water rating: 1 ATM (10 meters), Neck size: Minimum of 9.5” (24 cm) in circumference, High-sensitivity GPS/GLONASS receiver: Yes.
The T 5 dog device with collar is a top-mounted, high-sensitivity GPS/GLONASS receiver that uses LED beacon lights activated from the Alpha® 100. The lights work in low light conditions and at night, and are visible for up to 100 yards (90m) away.