it's a perfect fit for the helmet, excellent 200m throw as advertised
now my set is complete
P7 front
P7 rear (red)
TK11 R2 on my helmet
all uses the same battery type, now i can swap around the batteries without having to worry about carrying different types
pictures later, it's day time outside even until around 10pm ... LOL

it's hard to get a good night shot to show the TK11 R2 in action