Garmin Foretrex 201 Hands-Free GPS Navigation with Rechargable Lithium Ion Battery WAAS-Enabled, 12 Parallel-Channel GPS Receiver 500 Waypoints With 20 Reversible Routes 10 Saved Tracks &amp; 10,000 Saved Track Points Water-Resistant To Iec 60529 Ipx7 Standards Rechargeable Li-Ion Battery Offers 5-15 Hours Of Use (Depending On Backlight Settings)