Rechargeable Electric Hot Water Bottle Heats up in about 12 minutes and stays warm for approximately 5-8 hours! No battery required, it's rechargeable and doesn't need water changes! Can be used repeatedly ✧︎ ☆ This is a new, unopened item, but it has been stored at home, so please refrain from purchasing if you are concerned. ☆ Immediate purchase is welcome if you have no questions! ※ Since it is an unopened item, we have not confirmed its operation. If you have any concerns, such as operational defects, please let us know before leaving a review. ※ As it is a boxed item, it will be shipped in a simple package, directly in a packing plastic bag. - Model Name: MJ-8160 - Size: Approximately 27 x 18.5 cm - Weight: Approximately 1.35 kg - Materials: Polyester / PVC - Power Supply: AC100V 50/60Hz - Power Consumption: 400W - Heating Time: Approximately 12 minutes - Heat Retention Time: Approximately 5-8 hours