If you absolutely need the original PDF, try searching on or Manuals.plus using just WS-1958 (leave off the BT). Many generic units share manuals.
If the unit acts as a transmitter:
: Turn on the device; the LED will flash. Search for "WS-1958BT" on your phone's Bluetooth settings to connect. ws-1958bt music car speaker manual
: It is noted for its ability to play music via USB and TF cards in addition to Bluetooth. Sound Quality If you absolutely need the original PDF, try