Multi-Band Atomic Timekeeping (US, UK, Germany, Japan) Receives time calibration radio signals which keep the displayed time accurate Auto receive function (up to 6 times per day) Manual receive function Signal: US WWVB, UK MSF, Germany DCF77, Japan JJY40/JJY60 Frequency: US 60kHz, UK 60kHz, Germany 77.5kHz,Japan 40/60kHz Tough Solar Power Digital Compass 16 points of measurement Measuring range: 0 to 359 degrees Measuring unit: 1 degree Bearing Memory Memory Capacity: 1 record (stored direction angle and indicator) Altimeter Measuring range: -700 to 10,000m (-2,300 to 32,800ft) Measuring unit: 5m (20ft)