The following excerpt is from "Extreme Rocketry". The intention is to allow guests to get a basic feeling about a kit. We strongly suggest that you get a copy of the referenced Extreme Rocketry and read the entire article. Inside you will find many helpful hints in construction as well as other useful information. For more information, use the link above.

"Blacksky has introduced a new timer for HPR enthusiasts, the T2."
"The unit is very small and compact and utilizes a 9-volt alkaline battery for firing either igniters or electric matches."
"The timing range can be set from .1 to 256 seconds."
"The T2 timer is a two-function timer."
"The timer comes wrapped in bubble wrap…"
"There is also an instruction sheets…and an adhesive mounting template to locate screw mounting holes and the activating/arm screw."
"…it must be aligned with the vertical or thrust axis."
"The two timing ranges on each channel provide a great deal of adjustment."
"The standby time for the T2 is very long."

The article suggests various uses for the product. It also discusses mounting recommendations and testing procedures. Overall, the article suggests that this is a good timer to purchase for a variety of uses.