Amazon.com: erjigo KZ HD Bluetooth Headphone/Earphone Wireless Cable with Microphone Replacement for (B PIN (KZ-ZST/ZS10/AS10/BA10/AS06/ES4/ZSR)) : Electronics
KZ Bluetooth cable review: do away with wires - Soundphile Review
KZ bluetooth cable mod. I didn't like the original wire with the $10 BT adapter (too long and rigid) so I soldered on the original harness. Will post some pics to imgur :
KZ Bluetooth 4.2 Cable Module | eBay
OPEN BOX - KZ APTX Bluetooth cable Type "C" for KZ In-Ear Headphones w – CBN Music Warehouse
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KZ Bluetooth 5.0 Cable | Fast worldwide delivery!
Amazon.com: KZ PLUS Waterproof Aptx Bluetooth In-Ear Headphones Cables with Microphone Replacement for (KZ ZST ES3 ES4 ZSR ZS10 AS10) : Electronics
Amazon.com: KZ AZ09 PRO Bluetooth 5.2 Module IEM Bluetooth Adapter Waterproof Ear Hook Extra Long Battery Life Bluetooth Cable for KZ ZS10 PRO/ZSN Pro X/ZSN PRO/ZEX PRO/AS16/ZAX/DQ6 /CCA CA16 /C12/CRA(C pin) :
KZ Bluetooth 4.2 Cable Module | eBay
KZ ZS5 85cm Bluetooth 4.2 Advanced Wireless Upgrade Module Headphone C
Amazon.com: G.K KZ Upgraded Bluetooth Cable 0.75 MM C PIN IPX5 Waterproof Bluetooth 5.0 Noise Reduction Bluetooth Cable CSR8675 Chip for kz Earbuds ZAS ZS10 PRO ZSN PRO AS16(C Pin) : Electronics
Amazon.com: CCA KZ AZ09 Bluetooth 5.2 Module IEM Bluetooth Adapter Wireless Waterproof Ear Hook Extra Long Battery Life Bluetooth Cable for KZ ZS10 PRO/ZSN Pro X/ZSN PRO/ZSX/AS12/AS16/ZAX CRA/C12(C pin) : Electronics