Computer Accessory Sets features: Aptx Bluetooth Transmitter Receiver Wireless Adapter Toslink/SPDIF Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. This wireless audio transceiver adopts latest BT 5.0 technology, allowing a fast connection and stable deIivery. It has three ways of connection, AUX, RCA and optical connection. In Transmit (TX) mode, it can stream audio from your smart phones, laptops to any BT headphones or speakers. In Receive (RX) mode, It can receive wireless audio from your phone, tablets to your home stereo or speakers. Features:1.The optical transmission can deIiver better signals and minimize noises to keep the best fidelity of sound.2.This Blutooth adapter is both transmitter and receiver, designed for 2-way high-quality remote audio streaming.3.Compact size and lightweight, easy and convenient to store, durable to use.4.Three connection options, 3.5MM plug (AUX, RCA) and digital optical (SPDIF/TOSLINK), are suitable for most media devices, such as smart phones, laptops, speakers, earphones and so on.5.Adopt latest BT 5.0 technology, allowing a fast connection and stable deIivery. And it can automatically reconnect to the last paired device easily once power on. Specifications:1.Product Name: Wireless Audio Receiver2.Bluetooth Version: V5.0 Class II3. Bluetooth Profile: RX: A2DP / AVRCP, TX: A2DP4. Chipset: CSR86755. Supported Codecs: AptX-HD / AptX-LL / AptX / FastStream / SBC6. Frequency: 2.402GHz-2.480GHz7.Battery Capacity: 400mAh Rechargeable Lithium Battery8.Transmitter / Receiver Working Time (AUX): 18 Hours9.Transmitter / Receiver Working Time (SPDIF): 15 Hours10.Charging Time: Approx. 2 Hours11.Charging Supply: 100-240V AC Adapter12.Item Size: 5.5*5.5*1.5cm / 2.17*2.17*0.59in13. Item Weight: 34.2g