ZK-ST21 2.1 Channel Bluetooth Amplifier Board 100W+100W+200W Subwoofer TPA3221 Support Bluetooth AUX U Disk Sound Card COD

Compatibility

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Features:Parameter:Package include:

Type 1: 1 x Amplifier board

Type 3: 1 x Amplifier board external lead type

1. Shipping does not include power or audio cables. 2. Install external antenna (special scenario): 2-1. The boards are all equipped with onboard antennas, with a normal distance of 10-15 meters. If they are installed in a metal shell (which will block the signal) or increase the Bluetooth distance (20-30 meters), external antennas will be used. 2-2. Customers are required to purchase 2.4G antennas (antenna extension cables, antenna rods) on their own, and this product does not include external antennas.