K380F Wireless BT Karaoke Microphone

Features: [Metal Mesh Head] The metal mesh head is imbedded with sopnge filter to sieve noise. [Exquisite Battery Case] The microphone is powered by two AA battery; and the receiver is powered by a 2800mAh 18650 battery. When filling them in the case, you need to place the battery correctly, negative with - and positive with +. [6.5mm Standard Plug] The 6.5mm connector is suitable for amplifiers, mixers and other equipment; in addition, we will attach a 6.5mm female to 3.5mm converter, allowing you to connect more audio equipment. [Background Music] The microphone and the receiver are automatically connected whenthey are powered on. You can connect the receiver box with your smartphones via BT and play the background music. [Support Karaoke Apps] Support all kinds of karaoke apps, so you can singing and recording the songs you like. Two Ways to Connect the Receiver and the Speaker: 1. Line-in Mode: Plug the 6.5mm or 3.5mm connector in to a audio output device with 6.5mm or 3.5mm audio port. 2. FM Mode: Adjust the FM frequency on an audio output device, which has FM fuction, to match one of the three frequencies on the receiver (Red 105.4MHz, Green 106.7MHz, Blue 107.2MHz). Parameters: Microphone: Operating voltage: 2V-3V, 2 * AA batteries Transmission power: 10MW Distance used: 15M Sensitivity: -53DB3db Frequency range: 680MHZ-689MHZ (UHF band) Variable working channel: 10 channels Distortion: 1% Signal to noise ratio: 70db Frequency Response Range: 80HZ-10KHZ Microphone impedance: 600O30% at1khz Working current: 150MA Working temperature: -25C-60C Microphone Size: approx. 24.7 * 5.5 * 5.5cm / 9.72 * 2.16 * 2.16in Microphone Weight: approx. 160g / 5.64oz Receiver: Power supply: 18650 rechargeable lithium battery Working current: 200MA Sample rate: 48KHZ Bit width: 16bit Delay: 5ms BT: 2.1 Output amplitude: 100MV FM transmit frequency: CH1 105.4 MHz; CH2 106.7 MHz; CH3 107.2 MHz Working temperature: -25C-60C Receiver Size: approx. 11.4 * 3.2 * 2.4cm / 4.48 * 1.25 * 0.94in Receiver Weight: approx. 30g / 1.05oz