Riff BT-X5 Car FM Bluetooth Transmitter Stick with 3.5mm Audio Jack + Microphone Connection Black

Producer: Riff. Product code: RF-BT-X5. The Riff RF-BT-X5 is a compact Bluetooth audio receiver that adds wireless audio streaming to speakers, car stereos and headphones with a 3.5 mm line-in. It connects to Bluetooth-enabled devices (phones, tablets, laptops) and provides audio playback and hands-free calling via a built-in microphone. The receiver is powered by a built-in rechargeable Li-ion battery and charges via a mini USB port.

Advantages

The RF-BT-X5 enables quick Bluetooth pairing and wireless music streaming to any device with a 3.5 mm AUX input. It uses a high-performance amplifier chip for stable output to headphones and powered speakers, and a robust Bluetooth IC for broad device compatibility. The unit supports hands-free calls through the integrated microphone, includes sleep mode for energy saving, and offers simple wired connection using the supplied 3.5 mm audio cable and a mini-USB charging cable.

Key specifications

• Dimensions: 5.00 × 2.00 × 0.50 cm
• Bluetooth: v3.0 + EDR, Class 2
• Profile support: A2DP v1.2 (with built-in microphone)
• Power supply: USB 5 V DC (built-in rechargeable Li-ion battery)
• Transmission rate: 3 Mbps
• Transmission range: up to 10 m
• Built-in microphone for hands-free calls
• Sleep mode for energy saving
• Playback time: up to 2 hours continuous (approx.)
• Connection: 3.5 mm audio jack (male-to-male cable included)
• Compatible with home speakers, car stereos, headphones, laptops and smartphones

How to use

Charge the receiver using the included mini-USB cable before first use. To turn the device on, press and hold the ON/OFF button for 5–7 seconds until you hear a voice prompt indicating it is ready; the device will attempt to auto-connect to a previously paired phone. To turn it off, press and hold the ON/OFF button for 4–5 seconds until the LED changes. Connect the receiver to your speaker or car AUX input using the 3.5 mm male-to-male audio cable; ensure the plug is fully inserted if there is no sound. To pair a new device, press and hold the ON/OFF button for about 7 seconds until the LED flashes red and blue and a voice prompt announces readiness, then enable Bluetooth on your phone, search for devices and select "BT310REV" or "DL-LINK". After successful pairing the LED will flash blue and a voice prompt will confirm the connection. Use your phone to play audio and accept calls through the receiver’s built-in microphone when connected.

Recommendations

For best results, fully charge the RF-BT-X5 before use, keep the receiver within 10 m of the source device and avoid obstacles between devices. If pairing fails, remove previous pairing records on your phone, restart Bluetooth and repeat the pairing steps. Use the supplied 3.5 mm cable for a reliable wired connection to speakers or car AUX inputs.