Audio and Connectivity
Audio on the VK4000 is quite basic. It does not feature a loudspeaker, and the absence of a 3.5mm audio jack means users must rely on downloadable polyphonic and MP3 ringtones for personalized alerts. A lack of radio and standard USB connectivity is evident, with only a proprietary interface included. However, Bluetooth connectivity is available, supporting wireless pairing with compatible devices for data transfer and headset connectivity.