Polar | Accessories | Polar Ft4 Heart Rate Monitor Digital Watch Only White Pink 38 Mm New Battery | Poshmark
HQRP 10 Pack Coin Battery for Polar FT4, FT4F, FT7, FT7M Heart Rate Monitor Training Computer + Coaster
Polar FT4 Sport Watch - Heart Monitor (bpm), Time Display, Date & Day Indicator, Water Resistant, Low Battery Indicator, Silver/Black - FT4M at TigerDirect.com
Polar FT4 Digital Watch Women Heart Rate Monitor Pink New Battery A3 | eBay