Sekonic 401-823 Lumigrid for 398 series meters

Incident Metering for Ambient & Flash
Range: -2 to 22.9 EV at ISO 100
Cine Setting: Frame Rate & Shutter Angle
70mm Colour Touchscreen LCD
Flash Analyzing Function
Filtration Compensation Mode
Illuminance/Luminance Measurements
Contrast Function & Memory Mode
Custom Exposure Profiles & Calibration

SpyderPro Advanced Colorimeter
SpyderPRINT
SpyderCUBE RAW Calibration Tool
Durable Metal Case
Expanded Sensor Capability
Precise Screen Color and White Balance
Display Calibration System
Measures up to 2000 nits of Brightness
Supports Wide Range of Monitors
Windows and Mac Compatible

Display Calibration System
Rec. 709 & Rec. 2020 Calibration Targets
Gamma Curve Adjustment
90-Second Calibration Time
Supports a Wide Range of Monitors
Match Color Across Multiple Displays
Advanced Display Mapping & Analysis
Device Preview Beta
Integrated USB-C Cable
Windows and Mac Compatible