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Thanks for yr time answering 55six.:thumbsup:

Does the 640 model 35mm wifi to yr phone thru a sytong app?so you can watch and control the monocular on yr phone screen while its on a try pod out side.

Yr above unit is about $1200 cheaper than my InFiray 35 irfat todays prices.Interesting.

Had a 38mm pulsar,went up to 50mm conetec,too much horse power and like lifting up a 1kg dump bell every 5 minuts.Now have beening using a 35mm infira with built in range finder for the last 18...

35 mm is good,50mm is very good for longer range and id.Sytong service is great.