The Radar DS Solar Alarm is the first solar powered alarm unit. It works with a Lithium-ion accumulator that charges through the rear mounted solar panel. This Li-ion battery has sufficient power to last for many weeks of fishing. You do not even need sunny conditions to charge the Li-ion accumulator, with simple daylight being more than enough to provide full power. We have absolute confidence in this product, and you can be assured of trouble-free performance after purchasing this alarm, which is why we give you a 2 year unlimited warranty. Designed, developed and manufactured in Europe. Available in 4 colours individually or as a box set of 3 blue alarms with receiver or a box set of 3 colours (R,Y,G) and a receiver.