mechanical pencils with pencil sharpeners 2 0mm replaceable automatic pencils 2b pencil for exam japanese stationery

General specifications:1. Product size: 44.7x 10.5mm 2. Case material: aluminum alloy, ABS+PC3. Strap specifications: 22mm silicone strap (removable and replaceable)4. Product weight: 40g 5. Waterproof level: IP676. Battery life: 5-7 days (depending on usage scenarios)7. Charging time: Less than or equal to 2H8. Compatible with smartphone systems: Android 4.4 or IOS 9.0 or above systems that support Bluetooth 5.2 BLE9. APP name: Glory Fit 10. Watch firmware language: Russian, Indonesian, German, Italian, Czech, Japanese, French, Polish, Simplified Chinese, Traditional Chinese, English, Portuguese, Spanish, Arabic, Korean, Dutch, Hindi 11. APP language: Russian, Indonesian, German, Italian, Czech, Japanese, French, Polish, Simplified Chinese, Traditional Chinese, English, Portuguese, Spanish, Arabic, Korean. Hardware Configuration:1. MCU: RTL8763EWE2. RAM: 64KB3. ROM: 521KB4. Flash: 128. Mb 5. Heart rate chip: LC11S6. Bluetooth: BLE5.27. Display: 1.83 inch, 240x 280 TFT display 8. Physical buttons: 19. Touch: Full screen touch 10. Battery: 300m. AhSoftware configuration:1. Built-in dials: 6 built-in dials, supports custom dials 2. Basic functions: Data, Female physiological cycle, exercise mode, call history, contacts, call reminder/answer/reject, music, message push, sedentary reminder, alarm clock, wrist flip screen on/off, shake to take a photo, do not disturb mode, search for phone, step count, countdown, stopwatch 3. Bluetooth call connection: Connect 1 time 4. Health management: Sleep monitoring, heart rate, blood pressure, blood sugar, Blood oxygen, temperature detection 5. Sports modes: 100+ sports modes