Models View all Touch sensor button 1 34 0 PCB circuit board 1 20 0 Lithium polymer battery 3.7 V 650 mAh 1 29 0 Lithium polymer battery 3.7 V 600 mAh 1 85 0 SMD Micro Tact Switch HX-A06-C1 1.5 mm DM2351 1 26 0 Small Square Speaker 4 ohm 3W 35×25 mm 1 46 0