10pcs Laser Diodes 5mW 650 nm Diodo RED Dot Laser Diod Circuit 3V/5V 5mW 650nm Module Pointer Sight Copper Head $0.65 - $0.93 Min. order: 1 piece Headphone amplifier board MAX4410 miniature headphone amplifier can be used as power amplifier preamplifier instead of NE5532 $1.03 - $1.29 Mi...