SPECIFICATIONS:Audio Response Range: 20Hz-20kHz uncompressed digital transmissionTransmission Range: Max.50M (No obstacle); 30M (through-wall)Transmission Delay: Less Than 4msPower Supply: Built-in 3.7V 600mAh rechargeable lithium battery4 pairs of devices work non-interference uhder the same circumstances.Easy to use, plug and playPACKAGE LIST:1 * Transmitter1 * Receiver1 * USB Charging Cable
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