Well our friends over at crimson trace have been busy little bees! They have a whole new line up for 2012! We focused on The new Gen4 Glock Compact Here are few specs:
Attachment is a back strap
Activation is from the back of the grip
It does have a Master on/off switch
Battery Life is estimate at about 4 hours with a 2025 Lithium Battery (2)
User adjustable windage and elevation!
MSRP is around $279