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UP4 detailed parameters:
1.Weight: 37g 2.Size: 60mm * 36mm * 13.5mm
3. Output power: 71mW @ 32Ω (single-ended, high gain) / 91mW @ 32Ω (single-ended, dual DAC mode) / 160mW @ 32Ω (balanced)
4, signal to noise ratio: 120dB (single-ended) / 120dB (balanced)
5. Output impedance: < 1Ω (single-ended) < 2Ω (balanced)
6. Channel separation: 73dB @ 32Ω (single-ended) / 96dB @ 32Ω (balanced)
7. Distortion: 0.003% (LDAC) / 0.03% (others)

In addition, let's review the power of UP4 again:
1. Dual ES9218P DAC chip, 2.5 mm balanced output + 3.5 mm single-ended output;
2. With high gain and low gain modes, dual DAC boost mode can be turned on in single-ended state;
3. CSR8675 Bluetooth 5.0 Qualcomm chip, support full Bluetooth encoding format;
4, mainstream Type-C interface, support USB DAC function, can be used as a computer external sound card;
5.Single-ended battery life is up to 15 hours, and balanced battery life is up to 10 hours;
6, dual Hi-Res audio certification, wired or wireless, have good sound quality;
7. Supports NFC one-button direct connection, and comes with a removable back clip as standard, which is more convenient to use

EL2 balance upgrade short-term, will also be on sale on November 11th at 0:00, priced at 198 yuan.
1. Eight-strand 18-core 6N Furukawa fully silver-plated oxygen-free copper wire has excellent analysis and improves the mid- and high-frequency performance of the headset;
2. Separation of left and right channels, dual-way balance design, improve sound details, tri-frequency, separation and sound field;
3. The newly upgraded MMCX pins have a lifespan of 4 times that of ordinary MMCX pins;
4. The ear hook is made of PE material, with a curved ear, which is skin-friendly and comfortable to wear.
5. Upgraded closed knitting process can effectively prevent wire oxidation.

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