5pcs 980nm 30mW IR Laser Dot Diode Module TTL. 5x 980nm 30mw dot laser module w/ TTL. 980nm IR lasers can't be seen light by the bare eyes. Brass Size: 8x13mm. If you only connect its black wire and red wire, the laser would not work, you also need to connect its yellow wire (TTL+) to 5v+.
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