The BT39 Bluetooth receiver decoder uses ESS's ES9039Q2M decoding chip, and the sound is better than ES9038Q2M, both in charm and dynamic. The Bluetooth chip uses QCC5125, supports LDAC, supports 24BIT, 96KHZ high bit rate transmission. Internal power supply is the basis of good sound, and the op amp part is positive or negative 12V power supply, ensuring the performance of the op amp. The LPF circuit of the decoding part has been redesigned to produce a better effect, and the ELNA audio capacitor makes the sound more delicate and durable. The filter part uses Nikon's gold robe capacitor for better performance and lower ripple. BT39 also supports the USB input function of TPYE C port, which can be connected to a computer or mobile phone through a USB cable. The ES9039Q2M chip changes the style of ESS company in the past, and the sound is very delicate, sweet and transparent. The first sound feels like listening to AK4499 EX, this style has changed too much, the sound is really comfortable, the details, the flavor, the sound field, and the dynamics are very in place, you know that this is Bluetooth, this effect has made many traditional CD players ashamed. The Times are constantly improving, and the cost performance of the BT39 is quite cracked, which can be played with those big desktop computers. The resistors are high-precision chip resistors to ensure a good signal-to-noise ratio of the whole machine. Model:DT39 Input:Bluetooth BLUE Output:RCA set, 3.5 headphone jack Working voltage:DC12V or USB 5V Standby power consumption:0.3W Decoding chip:ES9039Q2M Supported formats:SBC/AAC/APTX/APTX-LL/LDAC 16-24Bit 44.1-96Khz Total harmonic distortion:Less than 0.002% Signal-to-noise ratio:120dB Frequency response range:20-20K@1kHz±0.3dB Instructions for use: 1. the Bluetooth name is