Wireless Audio HiFi transmitter receiver QOLTEC model 56981 — Bluetooth/line-in audio bridge

QOLTEC Wireless Audio HiFi transmitter receiver model 56981 is a compact audio bridge that operates as both a Bluetooth transmitter and receiver. It enables two-way wireless audio streaming between Bluetooth-enabled devices and wired audio systems, and also supports a wired line-in connection where applicable. The device is designed to add Bluetooth capability to traditional HiFi systems, car stereos or active speakers and to receive audio from phones, tablets and computers for playback through non-Bluetooth equipment.

Advantages

The unit combines transmitter and receiver modes in a single compact housing, allowing quick switching between sending and receiving audio. Bluetooth connectivity provides a wireless link for stereo audio, while the available line-in option preserves compatibility with legacy devices. Low-latency operation and stable pairing ensure consistent audio performance for music and spoken content. Its small form factor and simple controls make it suitable for discreet placement near AV equipment or in a vehicle.

Suitable for

• Adding Bluetooth streaming to home HiFi amplifiers and powered speakers
• Connecting smartphones or tablets to car stereos without built-in Bluetooth
• Streaming audio from laptops or media players to non-Bluetooth speakers
• Using wireless headphones or speakers with older audio sources

Key specifications

• Functionality: Bluetooth transmitter and receiver in one device
• Audio input: wired line-in (analog) where supported
• Wireless: Bluetooth stereo audio streaming
• Latency: designed for low-latency audio transmission
• Form factor: compact, lightweight housing for flexible placement
• Controls: mode switching and basic pairing controls

How to use

Select the required operating mode (transmit or receive) using the device controls, then pair the QOLTEC unit with the Bluetooth source or sink according to standard Bluetooth pairing procedures. When using wired input, connect the line-in from the audio source to the device and set the unit to the appropriate mode. Position the device within recommended Bluetooth range of paired devices and adjust the connected audio system’s volume to a safe listening level. Refer to the supplied quick guide for LED indicators and detailed pairing steps.

Usage recommendations

Place the device in a location with minimal obstacles between paired Bluetooth devices to maintain stable streaming. Use wired line-in when maximum signal stability is required. For best results with video content, use devices and codecs that support low-latency operation to reduce audiovisual sync delay.