Redify hot water bottle can be used in office to warm hand and can also hold it while asleep. Heat therapy can help reduce menstrual pain for woman,is Best gift for mothers day, Valentine's Day. Technical Parameters : * Capacity:350ml * Size: 105X50X158mm (4.13X1.96X6.22 inch) * Injected Volume : 3/4 * Water Temperature : 80C / 176 F or so * Injected Volume while heating : top up with cold water * Heating Power : shall not exceed 800W * Microwave Teating Time : not exceed 3 minutes(2.5Mniutes is better) Water Injection Steps : A:Add hot water directly. 1.Place the hot water bag into the knitted cover. 2.Add 80C / 176 F hot water into it and keep 3/4 full. 3.Eliminate excessive air and firmly tighten the lid. B:Heating in microwave oven. Notice:not exceed 3 minutes(2.5Mniutes is better) C:Filled with ice water and applied to the body to reduce swelling or lower temperature. Matters Needing Attention : 1. The rubber washer under the cover plays an important role in preventing water leakage. Do not damage and lose. 2. DO NOT add boiling water into directly, it's favor to add 80C / 176 F waterand keep 3/4 full. It'll be better if a cloth cover is applied. 3. When it's left unused, make it dry enough and properly inflate it then place it under shady and dry conditions. 4. DO NOT close it to the body for a long time for fear of scald. 5. When it's put into microwave oven, please ensure the bag is filled with cold water and heating time not exceed 3 minutes(2.5Minutes is better) to prevent a burst. 6. If it swells during the heating process, please stop heating immediately. However, DO NOT open microwave immediately. 7. For children, please use it under the supervision of adults. Package Include: 1* hot water bag 1* knit cover