The BT39 Bluetooth receiver decoder uses 's new ES9039Q2M decoding chip, and the sound is 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 audio capacitor makes the sound more delicate and . The filter part uses '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 new ES9039Q2M chip changes the style of 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. 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 a good signal-to-noise ratio of the whole machine. Model:DT39 Input:Bluetooth BLUE Output: set, 3.5 headphone jack Working voltage:DC12V or USB 5V Standby power consumption:0.3W Decoding chip:ES9039Q2M Supported formats:/AAC//-LL/LDAC 16-24Bit 44.1-96Khz Total harmonic distortion:Less than 0.002% Signal-to-noise ratio:120dB Frequency response range:20-20K@1kHz0.3dB Instructions for use: 1. the Bluetooth name is"YJHIFI", the phone can search for the connection after the boot to . 2. USB port power supply voltage is 5V, the use of ordinary mobile phone charger can be. Do not use the USB 5V port and DC12V port at the same time, otherwise the circuit be damaged. 3. the DC power base specification is 5.5*2.1, positive inside and negative outside. Compatible with 5.5*2.5 plugs. 4. BT39 is set to Bluetooth priority is higher than USB input, if the Bluetooth is connected when playing via USB, when Bluetooth playback automatically switch to Bluetooth input. Note:Due to different production batches, the printed text slightly, but it does not affect the use. Colour:Gray Material:Aluminum Alloy Package Contents: 1 * Bluetooth Decoder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.