The Midnight Pebble has been developed using the very highest quality photoluminescent technology to provide a gentle illumination at night. It will charge up during exposure to natural or artificial light & will last until morning. It was developed as a glass stand for locating your bedside water, at any time during the night, the upward illumination clearly depicting the glass & its content. in addition the integrated timepiece will gently inform you of the time. Styles of the clock face are available in either Aviator or Nautical style, which fit perfectly with the stainless steel finish, similar to the instruments found on boats & aeroplanes. The Midnight Pebble would also make an excellent executive gift, it would look very at home on a home study desk, however you use the pebble it is an object of desire, which is both functional & fun. Glow in the dark coaster with integrated timepiece Available in Nautical or Aviator style (please note that design is chosen at random unless stated at checkout) Diameter 11cm Height 15mm Clock requires 1 x LR44 battery (Included)*** Please Note, there is a battery saver underneath the battery, which needs to be removed before the clock will work***