Enhance your outdoor adventures and navigation accuracy with this advanced GPS Electronic Altimeter, model FR510, crafted from durable ABS material for reliable everyday use. Featuring dual GPS system compatibility, this high-performance altimeter provides precise star positioning, speed tracking, and distance measurement. It records up to 9 sets of course reversal and return data, making it an essential tool for hiking, climbing, and other outdoor activities. Key Features: · Dual GPS System Compatibility: Supports two star positioning functions for enhanced accuracy in location tracking, speed, and distance measurements. · Comprehensive Altimeter Functions: Measures altitude within a wide range of -700m to 9000m (-1640ft to 32760ft) with 1m/3ft resolution, providing detailed height gain/loss data and 7x 24-hour historical height curve recording. · Height Change Alerts: Customizable height change interval prompts adjustable from 1 to 200 meters help you monitor elevation variations effectively. · Height Target Reminder & Analysis: Set altitude targets with timely reminders; analyze historical altitude data with built-in temperature and humidity records for comprehensive environmental awareness. · Advanced Barometer: Displays atmospheric pressure ranging from 300 to 1100 hPa (8.8 to 32.60 inHg) with high resolution (0.1hPa/0.03inHg) and features a 24-hour air pressure trend curve for weather prediction. · 16-Azimuth Electronic Compass: Provides precise directional information with 1° resolution, aiding navigation in outdoor terrain. · Additional Utility Functions: Includes time, date, alarm clock, flashlight, and a moon phase indicator compatible with GPS dual moon systems. · Durable & Weather Resistant: Constructed from ABS with an IPX4 waterproof rating, suitable for use in various outdoor weather conditions. · Built-in Rechargeable Battery: Equipped with a 5V 230mAh lithium battery ensuring convenient recharging and extended use. · Compact & Lightweight Design: Weighing approximately 136g, with dimensions of 100x66x20mm (3.94x2.60x0.79 inches), this altimeter is easy to carry and handle during your outdoor activities. Specifications: · Material: ABS · Model: FR510 · Battery: Built-in rechargeable lithium battery (5V 230mAh) · Working Temperature: -20℃ to +60℃ (-4°F to +140°F) · Storage Temperature: -30℃ to +60℃ (-22°F to +140°F) · Altimeter Range: -700m to 9000m (-1640ft to 32760ft), Resolution: 1m/3ft · Barometer Range: 300 to 1100 hPa (8.8 to 32.60 inHg), Resolution: 0.1hPa/0.03inHg · Temperature Measurement Range: 20% to 95% humidity · Compass Resolution: 1° · Weight: Approx. 136g · Dimensions: 100x66x20mm (3.94x2.60x0.79 inches) · Display Size: Approx. 48mm x 31.8mm (1.89x1.25 inches) Package Includes: · 1 x GPS Electronic Altimeter (Model FR510) This multifunctional GPS Electronic Altimeter delivers accurate altitude, barometric pressure, temperature, and directional data in a compact, waterproof design. Perfect for outdoor enthusiasts seeking precision and reliability, it ensures improved navigation and environmental monitoring during hiking, climbing, and exploration activities.