ITEM NAME:X500 Bluetooth 4.0 HiFi Audio Receiver Wireless Music Link for Phone Tablet Product Description Description: Features: Wireless Bluetooth HiFi sound quality; 2.4G dedicated omnidirectional antenna design, wireless transmission range up to 65 feet; Wide range of compatibility, applicable to a variety of audio equipment with bluetooth stereo audio functionality; Enhanced output drive capability, the output signal is applied to the audio speakers, amplifiers, and ordinary headphones; Metal housing design both aesthetic and durability; Efficient built-in lithium battery, long battery life up to 20 hours; HiFi sound quality, support AAC, MP3, SBC decoding; 3.5mm earphone jack output, compatible with 2RCA output for amplifier; Specifications: Bluetooth version: V4.0, CSR8635 chip Bluetooth Profile: A2DP Carrier frequency: 2.4G ISM band Work Channel: 79 Headphone frequency response: 20Hz- 20KHz Duration: 12 hours Standby time: 330 hours Charging time: 2 hours Included: 1 x Bluetooth Receiver 1 x User Manual 1 x Adapter 1 x Data Cable.Wireless Bluetooth HiFi sound quality;. HiFi sound quality, support AAC, MP3, SBC decoding;. 3.5mm earphone jack output, compatible with 2RCA output for amplifier;. Headphone frequency response: 20Hz- 20KHz.