Beeps when liquid reaches the top for people with a visual impairment.
Ideal for Cup, Glass or Mug! Ingenious device helps the user to pour liquid into a container, confident that it will not overfill. The Indicator is easily hooked onto the side of a cup, mug or glass. Emits two distinct tones to indicate the level of liquid. Intermittent tone indicates the cup is nearly full, continuous tone indicates it is full. Includes 3V cell batteries. RNIB approved.