Brand: Portatree Timing Systems Manufacturer's Part Number: 7500 Part Type: Practice Trees Product Line: Portatree Pocket Pal Practice Trees Summit Racing Part Number: PTS-7500 UPC: 68159007500 Practice Tree Type: Portable hand-held Practice Tree Material: Plastic Practice Tree Finish: Black/Yellow Bulbs Included: Yes Bulb Style: LED Full Tree (0.500): Yes Pro Tree (0.400): Yes Pro Tree (0.500): Yes Cable Included: No Power Supply: AA batteries Quantity: Sold individually. Portatree Pocket Pal Practice Trees Portatree's Pocket Pal practice trees are only 3 in. wide x 4.5 in. tall， but they're packed with full-size features so you can practice go-time anywhere. These single-user practice trees have NHRA-style LEDs that you can easily see outside， .000 perfect tree， .400/.500 second Full， Pro， and Blocker trees， plus adjustable delay box， bump down， rollout， and auto start features. Pocket Pal's record your average and best reaction times and you can practice against an adjustable preset time. The Pocket Pals run on 2 AA batteries (not included)， and are compatible with most Eliminator 2000 Practice Tree accessories， and include a hand switch.