1. Material: aluminum alloy 2. Power source: battery 3. Battery: AA battery x 1(Not included) 4. Light source form: LED 5. Power generation method: hand pressure 6. Purple light wavelength: 365nm 7. White light wavelength: 450nm 8. Detection range: 0-99.99mg/L 9. Maximum range: 50 meters 10. Size: 9.6x2.2x2.2 cm 11. Weight: 23 grams 12. Remarks: delivery without battery 13. One thing with multiple functions, can be used as a flashlight, fluorescent agent detector 14. Small and portable, not taking up space