Xtenzi Microphone External Bluetooth Mic Assembly for Power Acoustik Car DVD Nvigtion Stereo Recievers. Xtenzi Brand Replacement mic Microphone for Power Acoustik car sterio kit, Adopting electret condenser cartridge with high sensitivity , low impedance , anti noise and ant jamming capability , it's highly improved the speech quality of hand free car kit communication system. Easy to install with double sided tape and mount, 3Meter Long cable, Compatible with and more like PD-710DB,718NBT,740NBT,769NB,622NB,718NB,931NBT,931NB,762B, PNX-761,721