【Size】 ● Body: Approximately 26cm wide x 19cm long ● Cover: Approximately 28.5cm wide x 21cm long ● Including cover: Approximately 30cm wide x 23cm long x 12.5cm high Body Material: PVC Cover Material: Nylon 【No Need to Replace Hot Water】 ● Simply plug in the power cord to easily accumulate heat. ● No need to boil water or pour it in, avoiding the risk of burns! ● It doesn't get too hot, cools slowly, and is an eco-friendly hot water bottle that can be used repeatedly. 【Temperature Setting Function】 ● You can set your desired temperature with the temperature setting button. ● Approximately 15-20 minutes of heat accumulation from the AC power source provides up to 8 hours of heat retention. 【Use it Anywhere, by Anyone.】 ● Cordless once heated. Carry warmth with you anywhere. ● The soft cover enhances heat retention. The flexible feel fits your fingertips, shoulders, and lower back. Provides comfortable warmth. ● The cover can be washed! Always keep it clean! 【In Situations Like These!】 ● Those who suffer from cold hands and feet. ● Those concerned about dryness from heating. ● Those concerned about a cold stomach. ● Those who are conscious of saving electricity. ● Those who are habitually cold.