Stop watch / Interval timer

Stop watch range 0 – 19 h 59 min 59 sec

Lap time range 0 – 9 h 59 min 59 sec

Lap / split times: max 10 / training session

Resolution 0.1 sec (until 1h)

1sec (1h to 19,59 h)

Interval timer range 1 0 – 59 min 59 sec (Upper row of LCD)

Interval timer range 2 0 – 39 min 59 sec (middle row of LCD)

Maximum intervals 99

Heart Rate

Resolution 1 beat

Accuracy +/- 1 beat / min

Display range 30 - 240 beats / min

HR upper limit 32 – 239

HR lower limit 31 – 238

Operating distance: Max range 95 - 135 cm

Transmitter belt

Weight 59 g

User replaceable battery CR2032

Water resistant to 20m/66ft (according to ISO 2281 standard)

Modulation frequency ca 5kHz

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Suunto X3HR manual Stop watch / Interval timer, Transmitter belt