SUPERIOR QUALITY AND 3 HEAT SETTINGS: Conforms to the UK’s highest safety standards, BEAB and EN standards. Our quality blanket features bed ties to secure to your king sized mattress and a choice of 3 heat settings (low, medium or high) adjustable with dual controllers for different temperatures to each side of the bed. The super soft polyester and extra large size is great for getting cosy and can even help to sooth aching joints/muscles and reduce dust mites. DUAL CONTROLS: Two controllers give both you and your partner access to independently control the temperature on each side of the bed to achieve your own personal preferred level of cosiness. You have the ability to switch one half off if heating across the full king sized bed is not required. KING SIZED: Durable, soft and fast pre-heating, the 160 x 150cm underblanket fits nicely on to a large king sized mattress and can be secured with the included bed loops and ties. Please note, the Staywarm King Size Superior Quality Electric Underblanket is not designed to fit edge to edge on the mattress. SAFE FOR ALL NIGHT USE: On the lowest setting this BEAB approved underblanket can be kept switched on to maintain a warm bed throughout the night, or pre-heat on high for 1-3 hours prior to going to bed. Made from 500gsm polyester and with thin wires, it offers a smooth surface to sleep on and allows you to warm up safely on cold winter nights. Overheat protection is built-in to automatically shut down if too much heat is detected as an added safety feature. 3 year warranty included. MACHINE WASHABLE: Suitable for machine washing at 30°C on a wool programme, simply unplug the detachable cord and controllers. Once clean leave to air on a clothes line and always ensure the product is fully dry before using again.