SPECS: Recommended Boat Length: 7 m / 23', 7 knots Mounting: Telescoping/C-Clamp 150+ hour run-time on three AAA batteries (not included) DESIGN AND DETAILS: Water-resistant bow and stern navigation lights Attwood's most durable, portable LED navigation light engines Sealed electronics, built to last in harsh conditions Sealed, shock-proof composite housing Shatter-proof polycarbonate lens New telescoping and threaded poles New heavy-duty C-clamp and kayak pad mounting options