Unnoticeable Lip-Sync Delay
Aptx Low Latency offers a total end-to-end latency of approximately 40 milliseconds (ms). BT-DUO S effectively minimizes audio latency or 'lip-sync’ issues (only if the paired BT devices supports aptX LL as well), which enables you to watch video while listening to wireless audio without noticeable lag. Please also order TD-BH01 Over-Ear Bluetooth V4.2 Headphones for the best low latency performance.

First-Ever Bluetooth Receiver with AptX LL
Almost all the 2-in-1 transceivers in the market don’t support aptX LL or aptX in the receiver mode. Unlike its peers, BT-DUO S has added aptX LL & aptX to the receiver mode. Your old quality wired headphones or speakers could now be turned into wireless headphones or speakers with the feature of aptX Low Latency.

Built-in Music Control
BT-DUO S now has the built-in music control buttons, which allows you to turn up/down sound volume, or to adjust track forward/backward when used in the receiver mode.

Specifications:
- Bluetooth Compliance: Bluetooth V4.1, CSR 8670 chipet, A2DP
- Transmit Range: up to 33ft / 10m
- Supports: Dual Stream (TX mode); Multi-Point (RX mode)
- Codec: aptX Low Latency, aptX, SBC
- Working Time: about 10 hours
- Charging Time: 2 hours / 5V; working while charging
- Dimension: 2.17 x 1.50 x 0.41 in
- Net Weight: 0.61 oz

IMPORTANT:
- BT-DUO S doesn’t have the built-in microphone and hence doesn’t support hands-free calling;
- The latency of 40ms is still unacceptable for live sound monitoring. Therefore, musicians beware! Bluetooth technology even with aptX LL may not suit your needs.
- Please do remember to email us for the help if you encounter any problem in pairing.
APTX and APTX LOW LATENCY SUPPORTED - Powered by premium CSR8670 chipset, BT-DUO S not only supports the latest Bluetooth V5.0, but also adds aptX and 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, 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 Bluetooth transmitter to your non-Bluetooth audio sources (TV, iPod, MP3 or Kindle e-Book reader), you can enjoy high quality music wirelessly or listen to late night shows without disturbing your family members on your Bluetooth headphones or speaker. Charging while working, the built-in battery could support the Bluetooth adapter to work for 9-10 hours per full charge
RX MODE BLUETOOTH RECEIVER w/ VOLUME CONTROL - Bluetooth adapter 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)
PAIR WITH TWO and SMART CODEC INDICATOR - In TX mode, Bluetooth transmitter can pair to two Bluetooth Headphones, and streams audio to both simultaneously. However, in this application, the codec will be downgraded to from aptX Low Latency to SBC. It can also tell you which codec is in place by displaying different LED status. The blue LED blinks once every 10 seconds for SBC, blinks twice for aptX, and blinks three times for aptX Low Latency
COMPACT DESIGN, CARRY EVERYWHERE - Bluetooth transmitter for tv, weights only 0.61oz, some round shape body, has good compatibility with most Bluetooth headphones. Easy to be store at home home and carry in road trip or flight to enjoy music. Note: The bluetooth adapter actually only RX-mode can be used in the car
COMPATIBILITY NOTE - Check if there is any AUDIO OUT socket in your TV's back panel. The BT-DUO S will not work when it is inserted into any AUDIO IN/COMPONENT IN sockets. If your TV only has a digital optical port for audio out, please order another model: BT-DUO X.
What You Get - BT-DUO S 3.5mm Bluetooth V5.0 Transceiver with aptX Low Latency, 3.5mm male to 3.5mm male aluminum audio adapter, 3.5mm male to 3.5mm male audio cable (50cm extra-long), 3.5mm female to RCA male audio cable, USB to micro USB charging cable, user manual in English