📊 Key Technical Specs: 📐 Angular accuracy: ~3″ (arc seconds) 📏 Distance measurement range: Up to 250 m reflectorless Up to 500 m with prism 🎯 Accuracy (distance): approx. ±1.5 mm at 100 m 🧠 Internal memory: up to 50,000 points 🔋 Battery: long-life Li-ion rechargeable system 📡 Connectivity: USB data transfer + Bluetooth support (model dependent) 🧭 Compensator: dual-axis tilt compensation for stability 🔦 Laser plummet + illuminated display for easy setup in low light 🌡 Operating durability suitable for harsh site conditions - Condition: ✔ Recently fully calibrated ✔ All measurements checked and verified after calibration ✔ Includes complete accessory set - Fully calibrated Leica Builder 503 total station in excellent working condition, complete set with all accessories included and ready for immediate field use.