Keep out of reach of children.  Adult supervision recommended. Do not operate machine without filling with water first.  Do not touch the electrical connection with metal objects.  Do not disassemble, repair or modify the machine.  Do not spray water or liquid over the device and tank.  Wetting the bottom will cause internal water intake causing potential for electrical shot, fire and malfunction.  Do not put in flammable liquid into tank.  If you are fitted with an internal pacemaker, you should not use this product as it could cause a sense of discomfort or if someone else in your family uses it, stay at least 3m away from operating Sonic Cleaner.  Do not touch the power plug with wet hands, especially when inserting or removing the plug.  Remove the power plug from the socket if the device is not going to be used for a long time.  Could cause fire, electric shock or malfunction.  If the machine is used several times consecutively, in order to avoid damage and failure of parts cause by overheating the machine will enter into a system of self-protection shutting down to cool off.  It will resume operation after approx. 5 mins. Do not add anti-bacterial, sterilizing or acidic solvents into the cleaning water.  May cause deterioration of resin and damage the stainless steel.  Do not clean pearls and other low surface hardness articles (morse hardness of less than 8).  Can cause damage, deterioration and loss of lustre.  Do not wash rings, necklaces with gems and diamonds for extended (long) periods.  Short regular cleaning will suffice.  Not recommended for jewellery with claw fittings as the ultrasonic vibrations may loosen fixings.