Features HIGH PRECISION & PRECISION - TCXO high-precision clock design, DIP package accuracy from 0.1 to 0.5ppm. COMPACT SIZE - High-precision external TCXO clock has a compact size that offers comfortable and stable operation, small body and stable performance. EXCELLENT PERFORMANCE - Premium material ensures longer service. Main Purpose: To solve everything for One, the need for a precision watch designed to meet the demand for a high-precision watch for One of births. IDEAL TOOL FOR WATCH AND GPS APPLICATIONS - TCXO watch is suitable for GPS applications and other high-precision watch situations. Specification: Working temperature: -20℃-85℃ Accuracy (PPM): 0.1ppm (ambient temperature 0-25°C) Weight: approx. 8g/0.3oz Size: approx. 26 x 21 x 9 mm/1 x 0.8 x 0.4 inches. Package list: 1 x for an external TCXO watch Package List