AK3040R Bluetooth Audio Receiver — Key benefits and purpose Upgrades non-Bluetooth home speakers, car stereos, and wired audio systems into Bluetooth-capable devices so you can stream music from a smartphone or tablet wirelessly. Simplifies connection with NFC one-touch pairing for compatible phones and straightforward Bluetooth pairing for all devices. Uses the latest Bluetooth 5.3 low-energy-loss chip for improved range and faster, more reliable audio transmission while remaining backward compatible with older Bluetooth versions. What makes it stand out Bluetooth 5.3 technology: Lower energy loss, longer transmission distance, and faster performance compared with Bluetooth 5.2 and 5.0, while supporting older Bluetooth devices. NFC quick-connect: Place an NFC-capable phone in the receiver’s NFC sensing area to pair with one touch (phone must support NFC). Multiple input/output options: Works with TF card playback and wired connections via 3.5 mm AUX or RCA for flexible use with a wide range of audio equipment. Compact and lightweight: Small footprint (6.8 x 6.8 x 2 cm) and light (45 g), easy to install and carry. Reliable indoor range: Reception distance up to 10 m indoors for typical home and car use. Standard power requirements: Input voltage 4.8 V to 5.25 V for common USB power sources. Features at a glance Model: AK3040R Wireless standard: Bluetooth Ver 5.3 (backward compatible) NFC: One-touch pairing for supported phones Local playback: TF card slot Wired audio: 3.5 mm AUX and RCA connections Reception distance: Up to 10 m (indoor) Size: 6.8 x 6.8 x 2 cm Weight: 45 g Power input: 4.8 V – 5.25 V Easy setup 1. Connect the AK3040R to a power source within the specified input voltage. 2. Enter pairing mode (device will indicate readiness). 3. On your smartphone, enable Bluetooth and select AK3040R from the device list. 4. For NFC-capable phones, enable NFC and tap the phone to the receiver’s NFC sensing area to pair instantly. Practical use scenarios In-car streaming: Plug the AK3040R into your car stereo’s AUX or RCA input to stream navigation prompts and music from your phone without replacing the factory head unit. Home audio upgrade: Connect the receiver to bookshelf speakers, a stereo amplifier, or older home theater equipment to add wireless streaming from phones, tablets, or laptops. Portable or offline playback: Use a TF card for direct music playback on systems without a connected phone, or switch between wired and wireless sources as needed. Compatibility and performance notes Compatible with devices supporting Bluetooth and NFC (for one-touch pairing). NFC function requires a phone with NFC support. Intended for indoor reception up to 10 m; performance may vary with obstacles and interference. Works with standard USB power supplies within the specified voltage range. Setup reminder To pair manually, power the unit, enable pairing mode, turn on your phone’s Bluetooth, and select AK3040R. For NFC pairing, enable NFC on the phone and tap the device’s NFC area. This description reflects the AK3040R’s functions, specifications, and recommended use without adding or omitting details from the original product information.