- suitable for the attaching to a temple of a glass or collar of a shirt
- light ray can be adjusted into any direction
- dimensions: 14 mm x 15 mm x 36 mm
- wavelength for red light: 620 nm - 635 nm
- duration time: 30-60 days based on intermittent usage, 6-12 hours based on continous usage
- 4 batteries included (LR41)
- weight: 9g (incl. batteries)
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