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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Aliexpress
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Banggood
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Link: Banggood product page
Price: $-3
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Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG09975, 7d18f7, BGherra, BG11SHOP, BGG09975JP, BGJPiio024, BGG09975CZ, BGG09975, BG1G09975
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for Tinysa 100kHz-350MHz Tiny Spectrum Analyzer. The lowest price was: $48.99.
Price records source(s): Banggood
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You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).