This price has ‘plot twist’ energy: $20.87 (Banggood). ZK-TB21 PRO 2.1 Channel 5.2 Stereo bluetooth Amplifier Board 50W+50W+100W TPA3116D2 Chip AUX Amplifier – Black.
Updated: 16-08-2025
Banggood
Warehouse in China.
Link: ZK-TB21 PRO 2.1 Channel Stereo Bluetooth Amplifier
Price: $20.87
Additional Banggood coupons:
1. First page
2. Second page
Aliexpress
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Price history and price alert
There is only one database record (it was for $18.99), so you can’t see price history chart.
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)).