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The Coospo Realzone H9Z may be a no-frills heart rate monitor, writes Kieran Alger, but it’s cheap, reliable and has a useful rechargeable battery upgrade
Coospo Realzone H9Z
£36,
coospo.com
The Realzone H9Z chest strap offers much the same basic set-up as its slightly cheaper stablemate, the Coospo H808S. But there’s one big difference: it swaps the classic chest strap coin-op battery for a rechargeable sensor with its own USB dock.