Internal patch antenna which works quite well when used outdoors SMA connector for external active antenna for when used indoors. PPS output can be used to coordinate the time with the satellite. The L80-39 with 66 search channels and 22 simultaneous tracking channels, acquires and tracks satellites in the shortest time at Outdoor. CP2102 as USB to UART Bridge chip, stable and faster. Communicate satellite with UART or USB. Support Raspberry Pi model A, B, A+, B+, Zero, 2, 3 with its' L80-39 GPS chip inside. Battery Discharge Capacity Testing Detection Meter. Transistor / Capacitor / Resistor Tester. Electric Tricycle & Bicycle DC Gear Brushed Motor. 
Flight Controller Board and Remote ( Receiver ). Components Kits ( LED, Resistor, regulator, etc.).
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