Sanrio Smartwatch Hello Kitty Design Belt Original Voice GH-SMWL-KT Product Specifications Display: 1.83″ TFT display (resolution 240×284) Bluetooth Standard: Ver. 5.1 (BLE) Output: Class 2 Frequency: 2.4GHz band (2402MHz~2480MHz) Communication Range: Approximately 10m Battery: Lithium polymer rechargeable battery (250mAh 3.8V) Operating Time (approximate): Duration: 7 to 10 days (shorter if speaker/microphone is enabled) Charging Time: Approximately 2 hours Supported Languages: 13 languages: Japanese, English, Simplified Chinese, Traditional Chinese, Korean, German, Russian, Spanish, Italian, French, Portuguese, Swedish, Turkish Compatible OS (CharaLife): Android 9.0 or iOS 12.0 or later Size (main unit): Approximately W38×D44×H9 (mm) (excluding band) Wrist Circumference (approximate): Approximately 125~165mm Weight: Approximately 40g~45g (varies depending on the model) (including main unit and band) Operating Temperature Range: 0℃~45℃ Materials: Casing: Zinc alloy + PC + ABS / Band: Zinc alloy + microfiber leather If you like the product, we look forward to your purchase. Thank you very much.