This is the Epson WristableGPS J-300W running watch from Epson. It has the following features: * Employs "EasyView Display," a new technology that allows you to clearly see the screen even in direct sunlight or through polarized sunglasses, ensuring high visibility. * Equipped with a light that is clearly visible at night. It has various modes, such as constant illumination and "wrist turn," which illuminates the light just by looking at the watch without pressing any buttons. * Equipped with Epson's proprietary high-precision GPS system. * Features include heart rate zone display, setting target pace and time, and predicting race time based on VO₂max (maximum oxygen consumption). 【Specifications】 (Mainly extracted from Epson's website) Size (thickness): 13.4mm (excluding the pulse sensor) Weight: Approximately 51g Compatible wrist circumference: 130mm-200mm Battery: Lithium-ion polymer secondary battery Operating time: GPS measurement + pulse measurement: Approximately 16 hours Activity mode (activity measurement on): Up to approximately 5 days Watch mode (activity measurement off): Up to approximately 30 days Charging time (approximate time to complete charging): Approximately 3 hours Water resistance: 5 ATM (50m) water resistance Notifications: Sound, vibration Although Epson's app service has ended, making it impossible to manage training records on a computer or smartphone, the watch itself has various functions and can be used sufficiently as a running watch. I purchased it in 2019 for approximately 27,000 yen and used it for running for about 3 years. I have not used it as a daily activity tracker. I washed it lightly with water after each use, so it is in relatively clean condition. Also, a liquid crystal protective film is attached to the screen. In addition to the main unit, there is a charging clip, instruction manual, warranty, etc. (see photos). There is no packaging. It will be wrapped in cushioning material and shipped via Nekopos. #RunningWatch #SportWatch #Epson #GPS