One of the core functions of the laser USB pen is writing. It features a built-in replaceable ballpoint refill (typically a 0.5mm quick-drying type), delivering smooth and fluid writing with smudge-free ink. This meets everyday needs like office note-taking, classroom jotting, and highlighting key points, eliminating the need to carry a separate pen.
This marks its key distinction from the “laser USB drive”—which integrates only “storage + laser pointer” functions. The Laser USB Pen expands upon this by adding writing capability, truly achieving “one pen replaces laser pointer + USB drive + signature pen.” It proves more suitable for scenarios requiring simultaneous note-taking, storage, and presentation.

Mainstream laser USB pens typically adhere to Class IIIA safety standards (power ≤5mW), complying with international safety regulations to prevent eye damage. Within these constraints:
Red light (wavelength 650nm): Typical range 20-200 meters (effective daytime range approx. 20-50 meters, nighttime range up to 100-200 meters);
Green light (wavelength 532nm): Due to higher visual sensitivity, range is approximately 4-5 times brighter than red light. Effective daytime range: 50-100 meters; nighttime range: 100-300 meters. Some high-end models (e.g., with adjustable focus) achieve beam visibility exceeding 500 meters in dark environments.

The capacity range of laser USB flash drives is primarily constrained by the size of flash memory chips and pen-shaped structural design. Currently, mainstream products typically offer capacities between 16GB and 256GB, with some high-end custom models reaching up to 512GB. However, capacities of 1TB or higher have yet to become widely available.

Laser USB pen projectors predominantly feature red and green laser colors, with some high-end models supporting multi-color switching. Below are specific classifications and technical details:
Mainstream Color: Red Light (635-660nm)
Prevalence: Most common, covering over 80% of laser USB pen projector products.
Features:
High Safety: Primarily Class IIIA (≤5mW power), compliant with international safety standards, suitable for teaching, conferences, and similar settings;
Low Power Consumption: Red LEDs are cost-effective and energy-efficient, extending battery life (e.g., the Chenguang CG-502 laser USB pen offers up to 2 hours of continuous use);
Visibility: The light spot appears dim in bright environments, requiring use with a projector or dark background.