Excelvan K28 Dual Wireless Karaoke Microphone Bluetooth with Receiver Box Various Frequency Full-Metal for Home KTV Education (Grey+Silver)

How to use?
❶Power Connect: Use USB cable included to connect DC 5V adapter or power bank.
❷Turn on Microphone: Long press power button. If not on, check if batteries (2x 1.5V AA batteries, Not included in package) been put.
❸Audio Connect: Use the audio cable included to connect "LINE OUT" port of the receiver box and "LINE IN"/"AUX IN" of the audio.
❹Background Music Connect (Volume button of the receiver box can be adjustable):
â‘ Bluetooth: Make sure no cable in "LINE IN". Turn on Bluetooth device, search then connect to receiver box device named K28.
â‘¡LINE IN: Use audio cable included to connect "LINE IN" port of receiver box and any input power.

Specification:
●Working Frequency(Selectable): 500MHz - 690MHz UHF frequency band
●Frequency Space: 1MHZ
●Channel: Dual
●Color: Grey+Silver
●Microphone Frequency Response: 50Hz-18kHz
●Frequency Stability: ±5ppm
●Receiving/Transmitting Frequency Control: Variable channel, each microphone supports 25 channels optional
●SNR: ＞70dB
●Distortion: ≤0.5％
●Transmission Power: ＞10mW
●Pickup: Moving coil mic core
●Output Amplitude: 500mV
●Overall Frequency Response: 20HZ-20KHZ
●Mic Sensitivity: -53dB
●Microphone LCD Display: Battery voltage, channel number
●Hand Microphone Power Supply: 3V (2x 1.5V AA batteries)
●Receiver Box Power Supply: 5V adaptor or power bank
●Input Port: D3.5MM signal line
●Output Port: D3.5mm earphone jack

Package Included:
●2x Hand Microphone
●1x Receiver Box
●2x D3.5mm Audio Cable
●1x D3.5mm Audio-to-RCA Cable
●1x USB Plug to DC Plug Power Cord
●2x Antiskid Ring
●1x User Manual