Rio Blue Light Teeth Whitening Dental Care offers accelerated whitening in the comfort of your home home. At a fraction of the price you can achieve the same result as treatments used by professional dentists. Ideal for stains caused by tea, coffee, red wine & discolouration due to smoking & ageing. Contents: blue light transmitter, 2x mouth trays, 3x syringe applicators containing whitening gel, 2x lithium batteries & full instructions.