FINIS Large Digital Pace Clock LED lights allow for easy reading from multiple angles and more consistent sendoffs, Scrolling lights remain illuminated through the 0-60 second cycle, Center digits display seconds or minutes Rechargeable battery stores power for 100 hours of continuous use, Solar cells constantly recharge battery in natural and artificial lighting environments Also has 120 V UL ground plug for operating or charging needs(90 minutes required for full charge) Integrated handle and wheels allow for easy storage Durable aluminum frame with water-resistant Plexiglas front Wall-mounting kit included