Dual Link Bluetooth Transceiver, TX/RX, TF – BT310D

One Device, Two Ways to Go Wireless – and Now for Two People at Once
The Astrum BT310D is a Bluetooth 6.0 audio transceiver with Dual Link support, an LED display and TF card MP3 playback. Use it in TX mode to send audio from a TV, PC or compatible 3.5mm source to Bluetooth headphones, or switch to RX mode to receive music and calls from your phone through wired speakers or headphones.

Dual Link – Connect 2 Devices at Once
Pair two Bluetooth headphones or speakers in TX mode, or two phones in RX mode, allowing two devices to connect at the same time.

LED Display
The LED display shows the current mode (TX or RX), connected device names and connection status, so you can easily see what’s paired.

TF Card MP3 Playback
Insert a microSD/TF card up to 32GB, sold separately, to play MP3 files directly through connected headphones or speakers – no phone or Bluetooth source required.

Built-In Mic for Hands-Free Calls
In RX mode, pair the BT310D with your phone to answer, reject and take calls hands-free through your connected speakers or headphones using the built-in microphone. Calling is supported in RX mode only.

Technical Specifications

• Model: BT310D
• Bluetooth Version: 6.0
• Modes: TX (Transmit) / RX (Receive) / Dual Link
• Supported Protocols: HSP / HFP / A2DP / AVRCP
• Audio Decoding: SBC
• Display: LED
• TF Card: microSD, up to 32GB
• Audio Connector: Fixed 3.5mm AUX
• Charging: USB-C, 5V 1A
• Battery: 300mAh
• Charging Time: Approx. 2 hours
• Wireless Range: Up to 10m
• Weight: 28g
• Dimensions: 46× 48 × 14mm