CatEye: Safety first, the AMPP500S comes with maximum side visibility, USB-C, and securely held in place with our adjustable FlexTight™ bracket.Compact, bright, and versatile, the ViZ150 stands out with high visibility from OptiCube™ lens technology and Daytime Hyperflash™ mode in an economical package. FEATURES (AMPP500S)Rechargeable headlight (500 lm)Wide beam with OptiCube™ lens technologyExcellent side visibilityLarge power button for easy operationLow battery indicator (Illuminates in red with less than 20% battery remaining)USB-C rechargeable (USB-C cable not included)Mode memory functionFive light modes (High / Middle / Low / Daytime HyperConstant / Flashing)Turns on High mode with double-click of power buttonSturdy FlexTight™ bracketHelmet mount and center fork bracket (optional)RUNTIMES (AMPP500S)High mode 500 lumens: 1.5hrsMiddle mode 250 lumens: 3hrsLow mode 100 lumens: 8hrsDaytime HyperConstant mode 500/100 lumens: 5hrsFlashing mode 100 lumens: 60hrsFEATURES (ViZ150)3 LEDs (150 lm)Highly visible during daytime300 degree visibilityLong rear beam projectionOptiCube™ lens technologyLithium-ion rechargeable batteryMicro USB rechargeable (Micro USB cable not included)Low battery indicator4 modes *Charging time: 3hMode memory functionBattery Auto Save (The mode automatically changes to flashing when the battery power gets low.)New seat post bracket SP-15 which fits contemporary (kammtail) aero seatpostSnap System™RUNTIMES (ViZ150)Constant (20 lumens):5 hrsFlashing (15 lumens):70 hrsGroup Ride (5 lumens):33 hrsDaytime Hyperflash (150 lumens):15 hrs Battery: AMPP500S Li-ion rechargeable battery (3.7V-2200mAh)ViZ150 Li-ion rechargeable battery (3.7V-500mAh)Recharge time: AMPP500S approx 4hrs (1A)ViZ150 approx 3 hrs (0.5A)Mount size: AMPP500S φ22.0-35.0mmViZ150 φ21.5-32.0mm. Fits up to 130mm outer circumference. (SP-15)Recharge/discharge number of times: about 300 times(until the rated capacity drops to 70%)Water resistant: AMPP500S IPX4ViZ150 IPX4Other: AMPP500S Low battery indicator, Lighting mode memory function, Helmet mount / Center fork bracket (optional)ViZ150 Battery auto save, Low battery indicator, Light mode memory