Behringer BT251-BK Bluetooth Wireless Adapter for In-Ear Monitors

Behringer BT251-BK is a Bluetooth wireless adapter designed for in-ear monitors used in personal audio listening and mobile music playback environments. It enables wireless audio connectivity for users who want to convert compatible MMCX in-ear monitors into Bluetooth-enabled earphones. This makes it ideal for listeners who require wireless mobility while using professional in-ear monitor earphones.

The adapter connects to compatible earphones using detachable MMCX connectors and transmits audio using Bluetooth wireless technology. Integrated DSP processing manages audio playback and call communication while supporting multiple Bluetooth audio codecs. The built-in rechargeable battery powers the wireless module and is recharged through a USB charging connection.

This configuration supports wireless listening for music playback, mobile audio monitoring, and phone communication. Users can pair the adapter with compatible Bluetooth audio devices such as smartphones, tablets, and computers. The over-ear cable design helps maintain secure earphone placement during everyday listening.

Key Features

• Bluetooth Wireless Audio Adapter: Converts MMCX in-ear monitors into Bluetooth-enabled wireless earphones
• MMCX Lock-Snap Connectors: Detachable rotating MMCX connectors allow compatibility with supported earphones
• Bluetooth 5.0 Connectivity: Wireless transmission provides audio streaming and device pairing functionality
• Integrated DSP Processing: Digital signal processing optimizes audio playback from connected devices
• Qualcomm aptX Codec Support: Supports aptX audio codec for compatible Bluetooth audio devices
• CVC Noise Reduction: Built-in CVC technology helps isolate voice during phone communication
• Rechargeable Battery System: Internal lithium battery supports portable wireless listening
• Over-Ear Cable Design: Flexible earhook cable structure supports stable in-ear monitor positioning

Technical Specifications

System
Bluetooth: Version 5.0
Frequency range: 2402 MHz ~ 2480 MHz
Channel number: 79
Max output power: 5 dBm
Bluetooth range: Up to 10 m (33 ft) in line of sight
CODEC support: aptX, AAC, SBC
Call support: CVC 8.0
Mic sensitivity: -42 dB (±3 dB) @ 1 kHz, 0 dB = 1 V/Pa
Battery type: Rechargeable lithium battery
Working time: Up to 7 hrs
Standby time: Up to 150 hrs
Charging time: 1 hr via USB 5 V / 500 mA
Cable: Shielded, detachable
Connector: MMCX connector, detachable
Cable length: 25 cm (10")