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DC 12V Mini Submersible Water Pump 240L/H 63 Gallon Pump    VOLTAGE--DC12V/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: 240L/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.

Smart Car Robot Tire Wheel with DC 3-6v Gear Motor
Parameter Operating voltage: 3V ~ 6V DC
Reduction ratio: 1:48
Maximum torque: 800k.cm
Tire diameter: 65mm,Tire thickness: 28mm

GY-NEO6MV2 NEO-6M GPS Flight Controller Module 3V-5V with Super Strong Ceramic Antenna for Arduino EEPROM APM 2.5

Mini MP3 Player Audio Voice Module TF Card U Disk Board for DFPlayer Audio Voice Music Module
Supports sampling rates (KHz): 8/11.025/12/16/22.05/24/32/44.1/48
MP3 Player Audio Voice Module

SIM800L V2.0 5V Wireless GSM GPRS Module Quad-Band W/Antenna Cable Cap M105

Fan Motor 5V L9110 Module

HC-06 Bluetooth Serial Pass-Through Module
Works with any USB Bluetooth adapters.
Default Baud Rate: 9600,8,1,n.
Built in antenna.
Coverage up to 30ft.

Speaker small magnetic speaker 3W 4R 3 W 4 ohm diameter 36MM thick 20MM cone magnetic

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

Speaker small magnetic speaker 1W 8R 1 W 8 ohm diameter 66MM thick 12.7MM cone magnetic

SG90 9G Micro Servo Motor Kit for RC Robot Arm Helicopter Airplane Remote Control

Bluetooth master and slave moduleThrough the AT command, you can set this bluetooth module to the master mode can also be set to slave mode, even in iBeacon way work .it also Supports Apple Notification Center Service (ANCS)
base Board 4 PIN, leads to VCC, GND, TX, RX. You can be very convenient to connect to your arduino project or other DIY project
Working voltage 3.6 V to 6V,Default rate of 9600.There are 4PIN dupont cable in the package