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Speaker 0.5watt 8ohm + Power Amplifier Music Player Module
Size: 34 x 21mm
Fixed hole: 3mm
Pitch: 15mm
Speaker power: 0.5W / 8Ω
Speaker diameter: 50mm
Amplifier chip: LM386
Voltage: 5V

DC 12V Mini Submersible Water Pump 300L/H 63 Gallon Pump
VOLTAGE--DC12V/4.5W （AC is forbiden, Red wire "+" Black wire "-"）
Overvoltage Protection-If the voltage over DC12+1.5V, the water pump will power off.
Specification-Max Flow: 300L/H (63 Gallon); H-Max (Lift height): 0-3m
No Self-priming function-It must be completely immersed in water when using.
Detachable & Cleanable-Use only in clean water, not corrosive liquids. Can be disassemble if you need.

Fan Motor 5V L9110 Module

13KG 15KG Servos Digital MG995 MG996 Servo Gear for Futaba JR Car RC Model Helicopter Boat

CH340 Serial Port Debugger USB to TTL Converter CH340G module STC Download Cable Adapter Module

4 Channel Relay Module DC 5V
Equiped with high-current relay, AC250V 10A ; DC30V 10A
5V 4-Channel Relay interface board, and each one needs 50-60mA Driver Current
Be able to control various appliances, and other equipments with large current
Application：Supports all MCU control, The industrial field, PLC control, Smart home control
Indication LED's for Relay output status