Dimensions: 25cm x 17cm x 5cm. Heated hand warmer pouch. Keep your hands warm and comfortable! Our electric hand warmer combines the soothing benefits of a heating pad and hot water bottle. Use it to help soothe cold hands, relax sore muscles, and to help ease any kind of hand pain.hine-washable cover provides added insulation to shield the skin from direct heat. It will retain it's heat for up to 6 hours. Also great for use as a hand warmer or as a heat pad for soothing aches such as back pain etc. Simply connect the charging cradle and plug it into the mains. After around 8-12 minutes your Electric Hot Water Bottle will have reached a temperature of 70-75°C, perfect for warming up your bed on a cold winter night. With ever-increg energy bills you can save money using this rechargeable hot water bottle as it costs significantly less than boiling a kettle and the heat retention is far superior to traditional hot water bottles which do not retain heat for more than 1 hour.