Here are the specifications for the Approach R10: Battery type – Rechargeable, built-in lithium-ion battery Battery life – Up to 10 hr. Operating temperature range – From -10º to 55ºC (from 14º to 131ºF) Charging temperature range – From 0º to 45ºC (from 32º to 113ºF) Wireless frequencies/protocols – 2.4 GHz @ 6.2 dBm maximum and 24 GHz @ 20 dBm maximum Water rating – IEC 60529 IPX7 – The device withstands incidental exposure to water of up to 1 m for up to 30 min. For more information, go to www.garmin.com/waterrating. For more information contact us at product.support@garmin.com or visit our Support Center, https://support.garmin.com/en-US/. Thanks Jenny
