I have a Sports Instrument Circuit 5. Features and user manual can be found at www.sportsinstruments.com/support/C5.pdf. They work great, but the batteries are dead. $30 shipped, Paypal accepted.

Thanks codec. Sounds good, I have one other I'm contemplating will let you know tonight (mon. mar 7th) thnks for answering.

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Jim

**Note above poster works for a retailer selling bikes and related gear*