Sigma Chest Strap W/ Heart Rate Monitor Watch PC 15.11. NEW BATTERY | eBay
Amazon.com: Sigma Sport iD.TRI Triathlon GPS Watch with Multisport Training Mode, Wrist-Based Heart Rate, Outdoor Navigation, Lightweight and Waterproof,neon Mint : Electronics
Amazon.com : heart rate monitor accessories SIGMA chest strap for PC-watches with transmitter and elastic st : Cycling Heart Rate Monitors : Sports & Outdoors
User manual Sigma iD.GO (English - 46 pages)
Amazon.com: Sigma Sport iD.TRI Triathlon GPS Watch with Multisport Training Mode, Wrist-Based Heart Rate, Outdoor Navigation, Lightweight and Waterproof,neon Mint : Electronics