Resistive touch control, Slow switch control, Linear power supply to avoid switching noise, 2.8 inches diagonal screen, Optional TTL USART port on the internal PCB (SW not yet implemented), 16 bits per RGB pixel, Display resolution 320 * 240 pixels, USB serial port control.
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Banggood
Warehouse in China.
Link: Tinysa 100kHz-350MHz Tiny Spectrum Analyzer
Price: $-3
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