Keeler Standard Rechargeable Desk Set 1729-P-1029Please note the engraving will be displayed as two lines of 30 characters. The new compact modern design is ideal for ward, surgery, consulting room and casualty use. The robust construction is ideally suited to the busiest working conditions. Lithium ion technology provides over 2 hours of continuous use and 2 hour rapid charge. LED's indicate when battery life is low, charging or fully charged. More information: Using Ophthalmoscopes in Eye