The 1Mii B03Pro is a 2-in-1 Bluetooth 5.3 transmitter and receiver that upgrades any audio system. In transmitter mode, it sends audio from a TV, DVD player, or other device to Bluetooth headphones or speakers; in receiver mode, it turns a wired home stereo into a Bluetooth-enabled system for streaming from a phone, tablet, or laptop. It features a built-in SABRE audiophile DAC paired with a Qualcomm chip for a 121dB signal-to-noise ratio and lossless audio decoding, plus a family-friendly bypass mode that lets one person listen through headphones while others hear the speaker at normal volume. Dual antennas deliver up to 265ft (80m) of outdoor range and 80-110ft (25-35m) indoors, and it supports aptX HD, aptX Adaptive, and aptX Low Latency codecs with dual-link connectivity for two simultaneous Bluetooth connections. It offers simple plug-and-play setup with automatic device detection, plus optical, AUX, and RCA audio input and output.Condition Notes: This item is sealed