Kettler International Polar Chest Strap
Lightweight durable construction. 100% Waterproof casing. Easy adjust nylon strap and transmitter constructed with hygienic material. Adjustable elastic nylon strap provides true customization. Transmits heart rate to a number of Kettler fitness equipment (TX1 TX3, Coach E, R-400, SP 211, Paso 309, Paso 309R, Verso 309, RX 7, Ergo Race, EXT) or Polar heart rate monitor.