Bluetooth 5.2 Charging Power 5V DC Working Hours 10-12 hours Charging Time 2 hours ??2-in-1 Bluetooth Transmitter Receiver? In TX mode, the Bluetooth transmitter is plugged into non-Bluetooth devices such as TVs, PCs and MP3 players via AUX/RCA jack and transmits audio to Bluetooth headphones/speakers/soundbars; in RX mode, the Bluetooth receiver can be connected to wired speaker/earphones and to receive audio from smartphones via Bluetooth. ??Stable connection, stereo sound? Equipped with Qualcomm Bluetooth 5.0 chip, the Bluetooth transmitter for TV is an up-to-date audio adapter, not only helps to upgrade your old audio devices to Bluetooth capable without replacing them but also promises you a CD-like auditory feast. Note: Bluetooth adapter without volume control button. ??Seamless streaming, never miss a beat? With low latency encoder applied, the audio delay has been minimized to approximately 40ms, the Bluetooth transmitter will present fully synchronized audio and video. Note: Bluetooth headphones/speakers are also required to support low latency technology. ??Dual Devices Pairing? Being able to pair with two devices simultaneously, Aisidra Bluetooth transmitter can fulfill your thoughts of watching movies together with your partner using Bluetooth headphones, or to volume up music with two Bluetooth speakers playing concurrently. ??Working while charging, nonstop fun? Installed battery could support the Bluetooth adapter to work for 10 hours per full charge. When in the low battery status, the adapter could be plugged into power to get charged while working at the same time.