... comfort but healthy. Thermal jade mattress (CE Certified) (JKF-DT-180) Far Infrared Jade Mattress, thermal mattress, Warm Spectrum BioMat ... spirally wired design,safer and more reliable.Specification Model NoJKF-DT-180Name Royal Jade Therapy MattressVoltage220V/110VFrequency50Hz/60HzPower160WHeating cableAC220V/110VWork temp10 ... ~70°CDimensions57*96cm Thermal jade mattress (CE Certified) (JKF-DT-180)