Bluetooth Receiver and TransmitterBluetooth 2 in 1 provides TX/RX modes. In TX mode, it can transmit audio from your Bluetooth incompatible TV to your Bluetooth devices, such as headphones. In RX mode it can be audio from your bluetooth devices e.g. B. streaming a phone to a stereo device that disables Bluetooth. If you want to change the mode, you don't need to turn off the device. Bluetooth Hands-Free CallsIn receiving mode, this product supports Bluetooth hands-free calls. When a call comes in, press the multifunction button to answer the call; During a call, press the multifunction button to hang up; Once connected, double-click the multi-function button to redial when the call ends. Wide CompatibilityBluetooth adapter with the included 3.5mm cables, this adapter 39; Transceiver can be used in many ways on your computer. Laptop, home stereo, headphones, smartphone, MP3 player, CD player, etc. Auto Re-pairingJust flip the switch, set it to the mode you want, you can quickly and just connect. An internal battery ensures that the Bluetooth adapter can be used for up to 8 hours and immediately connects to devices that have already been paired. Bluetooth transceiver with greater compatibility, faster transmission speed and better sound quality. 250mA Lithium-ion Battery and Portable Design With the long-lasting 250mA lithium-ion battery, it can do more than 8 hours of continuous play hours on a full charge in about 2 hours. Wireless use, the maximum wireless range is 10 meters. The compact Bluetooth adapter is small, light and easy to carry. Bluetooth transmitter and receiver without external driver installation. Product parameters: Bluetooth version: 5.0 Working frequency band: 2.402GHz -2.480GHz < p>Performance class: Performance class 2 (class II) Audio codec: SBC Operating current: RX 22 MA TX 35 MA Built-in battery: 250 mAh< /p> Charging current: approx. 200 mA Charging time: approx. 2 hours Battery life: RX&gt; 12 hours, TX&gt; 7 hours < p>Bluetooth distance: 10m (open space) Charging method: Micro USB 5V/0.5A Charging method: input /Output connection: AUX interface Compatible: Android, IOS system mobile phones and PADs, and Bluetooth speakers or headphones that support A2DP protocol are connected to use. Product size: 52*52*13 mm Product weight: 75g Color: Black Supplied quantity: 1 piecea becomeveryrich< /p>