1、Bluetooth Transmitter Receiver: Built in 3 receiver transmitter Bluetooth module, transmission mode supports simultaneous connection of 2 pairs of Bluetooth earphones or speakers, reception mode supports connection of phones and tablets. 2、Multiple Functions: Supports the conversion signal from digital audio to analog audio, supports output volume adjustment, supports Bluetooth automatic search and connection to the receiver, and has power off memory function. 3、Good Performance: This wireless audio converter has built in high performance DAC chip that supports a 192K 24 bit sampling rate, with PCM optical coaxial input audio format, and an RCA output maximum level of 9vrms. 4、Multiple Interface: This Bluetooth audio converter supports 1 optical coaxial interface and 1 coaxial input interface, equipped with an RCA and a 5mm audio output, and has Bluetooth automatic connection function. 5、Long Bluetooth Range: Enjoy the wireless audio streaming with a Bluetooth distance of up to 25 meters. Move around your home or office without worrying about losing connection or experiencing signal dropouts. 1 x Audio Converter1 x USB Cable1 x Optical Audio Cable1 x User Manual Item Type: Bluetooth Audio ConverterOptical Coaxial Audio Format: PCMAudio Sampling Rate: 32-192k/24bitBluetooth Decoding Format: APTX LL, APTX HD, apt, sbcBluetooth Version: 5.3Bluetooth Protocol: A2DP, AVRCPBluetooth Distance: ≤ 25 meters / 82ftRCA Output Maximum Level: 9vrms 3.5mm Audio Port Maximum Output Level: 9vrms 3.5mm Audio Port Maximum Output Power: 32Ω 35mwMaximum Working Current: 5V 100MAWorking Temperature: -10℃-55℃Storage Temperature: -26℃-60℃Working Humidity: 10-90%RH