【230ft LONG RANGE & DUAL ANTENNAS】Utilizing Class 1 Bluetooth technology and dual antennas design, 1Mii B03 Bluetooth transmitter receiver can achieve a range of up to 230ft (70m) line-of-sight in open air and up to 80-110ft (25-35m) indoors. *NOTE: Operation range can be affected by Wi-Fi routers, Wireless TV adapters etc. and also depends on receiving device. 【NO LIP SYNC DELAY&DUAL STREAM】AptX Low Latency technology eliminate Bluetooth audio delay, Long Range adapter 1Mii B03 with 2 links, Pair with 2 pcs of Bluetooth headphones or 2 pcs of Bluetooth speakers & BOTH enjoy ultra fast, high fidelity audio. *NOTE: To achieve low latency, your receiving device must also support AptX Low Latency; Not support Low Latency under Dual Link. 【OPTICAL & AUXS】Supports both analog (RCA / 3.5mm AUX audio) and digital (optical) input and output! *NOTE: Please set your TV audio as PCM format as 1Mii B03 doesn't support Dolby / DTS format in optical mode.

APTX & APTX LOW LATENCY SUPPORTED. Powered by premium CSR8670 chipset, TROND BT-DUO S not only supports the latest Bluetooth V4.1, but also adds aptX & aptX Low Latency to both the TX and RX modes. With aptX, you can enjoy CD-quality sound wirelessly over Bluetooth connections with aptX-source devices like TV's, phones or tablets; with aptX Low Latency, you can now watch video while listening to wireless audio in a synchronized fashion AND without any noticeable audio delay TX MODE: BLUETOOTH TRANSMITTER. By plugging TROND BT-DUO S to your non-Bluetooth audio sources (TV, iPod, Kindle e-Book reader or Nintendo Switch/3DS), you can enjoy high quality music wirelessly or listen to late night shows without disturbing your family members on your Bluetooth headphones or speaker. Please also order TROND TD-BH01 Over-Ear Bluetooth V4.2 Headphones (ASIN: B075VLWPXF) for the best low latency performance RX MODE: BLUETOOTH RECEIVER w/ VOLUME CONTROL. TROND BT-DUO S can upgrade your old wired headphones (such as Bose QC25/QC15) or speakers into wireless with the support for aptX Low Latency. Its volume/track buttons allow you to play/pause music, turn volume up/down, and select track forward/backward. (NO hands-free calling due to lack of microphone; cannot be powered up automatically while you start the car ignition)