The Moon Helix Max 250lm is a high-performance LED rear light for cyclists, designed to enhance visibility and safety in low-light conditions. It features a COB red LED with a maximum output of 250 lumens and can run for up to 109 hours. The light includes intelligent operation with features like motion sensing, parking mode, and auto safe mode. It offers 5 lighting modes: DAY FLASH, STEADY FLASH, FLASH 1, MODE 1, and MODE 2. The casing is made of CNC Aluminium for heat dissipation. It is powered by a built-in Li-PO battery, rechargeable via USB Type-C, and has a recharge time of 2.5 hours. The light measures 22 x 19.5 x 81 mm and weighs 40g. It also features side visibility and is water-resistant (IPX 7).