Wireless audio transmitter Synergy 21 S21-I-00145

The Synergy 21 S21-I-00145 wireless audio transmitter uses Bluetooth connectivity to send audio from a 3.5 mm host interface to compatible receivers over distances up to 15 meters. Designed for straightforward setup, the compact transmitter supports common audio sources such as phones, tablets, laptops and audio players with a standard headphone output. The device enables cable-free audio transmission for listening, monitoring or basic AV integration where a short-range wireless link is sufficient.

Advantages

The transmitter offers simple Bluetooth pairing and a universal 3.5 mm connection that works with many consumer and professional audio sources. Its compact form factor and plug-and-play behaviour remove the need for complex installation. With a specified transmission range of up to 15 meters, the unit covers typical room-sized environments and small adjacent rooms. The design emphasizes reliable short-range wireless audio transfer and easy portability.

Suitable for

• Streaming audio from phones, tablets or laptops to a Bluetooth speaker or headset
• Connecting non-Bluetooth audio sources to Bluetooth-enabled receivers
• Use in living rooms, offices, classrooms or small event spaces
• Temporary setups for presentations, demonstrations or personal monitoring

Key specifications

• Wireless technology: Bluetooth (version determined by manufacturer)
• Host interface: 3.5 mm analog audio input
• Maximum transmission distance: up to 15 meters (line of sight may vary)
• Form factor: compact, portable transmitter
• Power: powered via integrated battery or external supply depending on model (refer to manufacturer documentation)

How to use

Connect the 3.5 mm plug to the audio output of the source device, power on the transmitter and enable pairing mode according to the manufacturer instructions. On the receiving Bluetooth device, search for available transmitters and select the Synergy 21 transmitter from the list. Once paired, start playback on the source device; audio will be transmitted wirelessly to the paired receiver. For optimal performance, keep the transmitter and receiver within the recommended range and avoid large physical obstructions.

Recommendations

Place the transmitter in a location with minimal interference from other wireless devices and maintain a clear line of sight where possible. For continuous or professional use, verify power options and charging procedures in the manufacturer documentation and periodically check pairings to ensure stable audio transmission.