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Quickview: Features: Small and exquisite appearance, it is convenient to carry. KTV sound effects, stereo double track earphone, it can distinguish the rhythm and intonation of song clearly. Echo reverberation, super echo sound effect, it can adjust the degree of echo. Channel switching, it support left and right channels of stereo audio switch. It can adjust the volume of microphone as you like. Matched with USB data line, it can charge for microphone. It can be used with mobile phone, computer, MP3, MP4. Consists of microphone, earphone, USB data line, audio cable etc, it can be used in splitting or combination. Perfect choice for you to exercise singing, you can sing anytime with this product. Specifications: Color: Blue Audiohead: Capacitive Sound output: *1dB**-**5dB gain adjustable Output power: *5mW Reverb mode: Echo sound effects reverb Power supply: Built-in lithium battery 3.7V **0mAh Maximum sound pressure level: **0dB(at 1kHz THD≤1%) Product weight: *7g Package weight: **9g Product size: 7.7 * 2.8 * 1.6cm Package size: *6.2 * *0.5 * 4.5cm