1. Lamp beads: 42. Output: DC5V 1A3. Switch mode: upgrade button4. Battery capacity: 1000 mA5. USB standard interface, built-in rechargeable lithium battery6. Free control of light direction, 360-degree universal adjustment7. Wearing light, long-term use without pressure8. Button description: press the astigmatism to converge the same light, then press the spotlight to turn on, and press the astigmatism light to turn on (in any lighting mode, long press for 2 seconds to adjust the brightness)9. Dimensions: 135x25x310 mm10. Weight: 101.8 grams

http://olla.gr/student-eye-protection-reading-led-neck-hanging-light-usb-rechargeable-outdoor-night-running-portable-lightspecification-stepless-dimming-white/