The Shield X Auto Rear can maintain 150 Lumen in day flash for 25 hours the Shield X is packed with features such as Memory mode which stores the last mode used making it easier to set up for your ride quickly. Low battery, charging & fully charged indicator & a quick 2 hours to recharge ensure you won’t get caught out mid ride. Light sensitive auto ON/OFF ], Side visibility, Water resistance Features 1 pc CREE XP-E + 1 pc (20 chips) COB high brightness red LED CNC Aluminium heat sink casing Light sensitive auto ON/OFF Auto safe mode Mode memory function Rechargeable lithium polymer battery (3.7V 700 m Ah) Recharge Time: 2 hrs 9 modes: Mode 1 / Mode 2 / Mode 3 / Mode 4 / FL1 / FL2 / FL3 / FL4 / DAY FLASH (DOUBLE BLAST) Quick release universal bracket RB-22 (fits all round & AERO style bars) Low battery, charging & fully charged indicator Automatic fully charged cut-off system High precision optical lens Side visibility Water resistance (IPX 4) Size (W x D x H): 59.5 x 33.5 x 24mm Weight: 0.05kg / Packing & Package: 0.1kg Max. auto on/off standby time: 250 hrs RB-22 (Universal bracket) 2 O-rings for mounting: RS-G (fits 20-35mm diameters) RS-H (fits 35-52mm diameters) BK-21 (Belt clip) RB-21 (Saddle rail bracket) USB (Universal Serial Bus)-WP (Water resistant USB (Universal Serial Bus) cable) This light is great for: side visibility day flash mode water resistance, quick 2hour recharge time & multiple mounting options with quick release. The Shield X is perfect urban commuters. Mode Lumen Runtime MODE 1 15 6:30 MODE 2 30 3:30 MODE 3 50 2:00 MODE 4 80 1:20 FL 1 15 40:00 FL 2 35 15:00 FL 3 80 7:00 FL 4 35 6:30 DAY FL 150 25:00 (Auto safe) around 1 hr