Various complex places, six color temperatures for comparison. Professional color display for different objects. Convenient and fast, select different color temperatures by pressing buttons. Professional grade lighting, color temperature stick to mark professional lighting colors. USB-C charging port, charge and use anytime, anywhere, no need to find a power socket, more convenient and faster. Product name: Portable Color Temperature Stick. Light source type: COB. Product power: 3W x 6 groups. Charging time: Approximately 1 hour. Color temperature range: 2700K - 6000K. Product appearance and printed text may vary by batch, but this does not affect functionality. Color: Black. Material: PC. Package contents: 1 x Portable Color Temperature Stick. Only the above package content is included; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and actual item. Measurement error allowance: +/- 1-3 cm.