It's a Shot Navi Air. It won't charge. Please understand that it will be treated as junk. It also supports competition mode. I've thrown away the box, so it's not included. Operation has been confirmed. Shot Navi Golf Air Wristwatch-type GPS navigation Shot Navi Air ・Industry's smallest and lightest ・Touch panel, convenient for smartphone users ・Auto View function ・Concentric circles, driving/layup circles ・Horizontal distance, estimated distance, elevation difference, recommended club ・Course layout display (100% compatible in Japan) ・"Reflective LCD" adopted for easy viewing outdoors ・High precision! Compatible with the quasi-zenith satellite "Michibiki L1S" ・Reliable, high-quality "Made in Japan" [Main Body Specifications] Size: 41.5 x 34 x 12mm Weight: 20g (excluding belt) Display: Color reflective LCD Battery: Lithium polymer battery Waterproof: IPX7/3ATM Full charge time: Approximately 3 hours (via PC) Continuous usage time: Up to 8 hours when using GPS Data update: USB storage mode Color: White