DROK Portable Stereo Bluetooth Audio Receiver Stereo Receiver Board Receiver Module for DIY Wireless Stereo Speaker Amplifier Support V3.0 Bluetooth for Headphone High-speed Bluetooth receiver processor chip creates a more stable audio transmission and excellent audio fidelity. Support V3.0 Bluetooth. The module can be paired with headphone, tablet PCs without entering keys. Effective transmission distance: 10-15m. Stereo receiver, let music does not has distance.Just some simple operations makes the audio become wireless audio. Dimension: 50388 mm (L W  H), ultra small size and convenient to install.