Sennheiser BTD 700

The Sennheiser BTD 700 is a compact USB adapter that adds Bluetooth 5.4 connectivity to a wide range of devices. It uses advanced audio codecs to ensure optimized signal transmission, outperforming standard built-in Bluetooth modules. Designed to meet the needs of audiophiles, gamers, and professional users, it enables access to the latest Bluetooth features—even on older equipment.

Ultra-compact design and user-focused ergonomics

The BTD 700 impresses with its extreme miniaturization. Smaller than a standard USB stick despite its advanced capabilities, it becomes virtually unnoticeable once plugged in. Its native USB-C approach, with an included USB-A adapter, ensures full compatibility with both current and future computing ecosystems.

This thoughtful design makes it easy to transport and use on the go. The dongle remains discreet on a laptop during business trips, while the adapter allows use on older desktop workstations. The robust metal casing guarantees durability that meets professional standards.

High-definition audio performance without compromise

The technical core of the BTD 700 lies in its ability to transmit audio signals at studio resolution. The aptX Lossless and Adaptive codecs deliver faithful reproduction of musical nuances, rivaling traditional wired connections. This technical feat overcomes the limitations of sources that do not natively support these advanced formats.

The impact is especially noticeable with Sennheiser headphones from the MOMENTUM and ACCENTUM ranges, already optimized for these codecs. But compatibility extends to all headphones and speakers supporting aptX, revealing sound details previously masked by basic codecs.

Voice call quality also benefits from this upgrade. Professional calls gain in clarity and stability, eliminating the typical artifacts of standard Bluetooth codecs.

Auracast technology and multi-device streaming

The BTD 700 ushers in the era of collective audio streaming with Auracast technology. This feature allows you to share the same audio stream simultaneously with multiple compatible headphones or speakers, opening up new possibilities. Outdoor movie nights, training sessions, or shared listening experiences become technically feasible.

This broadcasting capability also transforms home use. Several people can follow the same TV program with their own headphones, each at their preferred volume, without disturbing others. The dedicated Sennheiser Transmitter Updater app will allow you to configure and personalize these streams.

Gaming mode and optimized audio-video synchronization

The BTD 700’s gaming mode is its most technical specialization. Transmission latency drops to around 30 milliseconds with compatible headphones, ensuring perfect synchronization between visual action and its audio counterpart. This performance is crucial in competitive gaming, where every millisecond counts.

However, early user feedback reveals an important nuance: some notice more perceptible latency in standard mode compared to the previous BTD 600 model, but excellent results once gaming mode is activated. This suggests specific algorithm optimization depending on usage context.

Switching between modes is done via the dongle’s multifunction button or the dedicated app, allowing you to adapt performance to your activity.

Universal compatibility and easy installation

The BTD 700’s plug-and-play approach eliminates the usual technical constraints. Compatible with Windows, macOS, Android, and iOS (via USB-C), it functions as a standard audio device automatically recognized by the system. This simplicity masks considerable technical sophistication: the dongle takes over from the native Bluetooth output to offer its own advanced capabilities.

Bluetooth range is notably improved according to user feedback. Where some devices would lose signal after just a few meters, the BTD 700 maintains a stable connection over significantly greater distances. This improvement transforms everyday use, allowing you to move away from your source without audio interruption.

Technological evolution compared to the BTD 600

The BTD 700 succeeds the BTD 600 with targeted improvements. The move to Bluetooth 5.4 brings enhanced connection stability and optimized energy efficiency. The addition of the aptX Lossless codec is the most significant qualitative leap, enabling truly lossless transmission.

Auracast technology is the most visible new feature, absent from the previous model. The design also evolves toward a native USB-C approach, anticipating the standardization of this connector. These improvements justify the slightly higher price point, reflecting the integration of emerging technologies.

Technical Specifications

Audio Performance

• Supports aptX Adaptive and aptX Lossless codecs up to 24-bit / 96 kHz
• Ultra-low latency gaming mode: perfect audio/video sync with just 30 ms latency
• Auracast technology: simultaneous audio streaming to multiple devices with low latency
• Supported audio codecs: SBC, LC3, aptX, aptX Adaptive, aptX Lossless
• Exceptionally clear calls for crisp and reliable professional communication

Bluetooth Connectivity

• Bluetooth version 5.4, class 1
• Maximum power: 10 mW
• Transmission frequency: 2,402 – 2,480 MHz
• Supported modulations: GFSK, π/4 DQPSK, 8DPSK
• Bluetooth profiles: A2DP, HFP, Auracast
• Faster connections, extended range, and optimized energy efficiency
• Plug & Play operation: simple connection, one-time pairing, universal use without reconfiguration

Physical Specifications

• Dongle dimensions: 25.7 × 15.2 × 7.6 mm
• Weight:
  • dongle: approx. 2.2 g
  • adapter: approx. 3 g
• Ports: USB-C and USB-A with included adapter for flexible use

Power

• Power supply voltage: 5 V / 100 mA
• Input voltage range: 4.75 to 5.25 V

System Compatibility

• Supported operating systems: Windows 10 or later, macOS 11 and 12, Android 13 or later, iOS / iPadOS (USB-C only)
• Supported application: Sennheiser Transmitter Updater (PC / Mac)
• Broad compatibility with all types of devices thanks to USB-C and USB-A ports

Environmental Conditions

• Operating conditions:
  • temperature: 0 to +45 °C
  • humidity: 10 to 90%
• Storage conditions: -25 to +70 °C

Contents and Packaging

• Box contents:
  • BTD 700 Bluetooth dongle (USB-C)
  • USB-C to USB-A adapter
  • quick start guide
  • safety sheet
  • compliance sheet