SEIKO UH712G Closed: Height 7.2cm, Width 6.6cm, Thickness 1.2cm, Weight 40g Open: Height 7cm, Width 6.6cm, Depth 7.2cm Battery: CR2025, Battery Life: 7 years Retail Price: ¥4,725 I purchased this new and only used it when traveling. As you can see, it has been used, but it functions normally. Since there is no second hand, you can enjoy a quiet time. Although there is no box or instruction manual, anyone can easily use it. I will include a new button cell battery (CR2025). You won't need to replace the battery for 7 years. I will carefully package and ship it promptly.