•3-in-1 output, suitable for iPhones, Type-C smartphones, and devices with a 3.5mm interface •Automatic noise reduction, reverb, monitoring, external playback, and mute functionalities •2.4G wireless pairing, automatic connection upon startup, and easy operation •Compatible with various devices such as smartphones, computers, tablets, speakers, amplifiers, cameras, etc. Specifications: •Mic head: Digital microphone •Input Voltage: 5V •Microphone Battery: 200mAh •Receiver Battery: 200mAh •Battery Life: 12 hours •Signal-to-Noise Ratio: 64DBM •Transmission Delay: 30MS •Sensitivity: -42DB •Frequency Response: 20-20KHZ •Transmission Distance: Up to 15 meters without obstacles Notes: •1. The laptop needs to be set to microphone input before use. •2. Only suitable for Type-C devices with OTG function (production after 2019 is better). •3. Some Android phones need to activate the "OTG" function when plugging in a USB-C receiver. Package included: •2 x Transmitter •1 x Receiver •1 x Charging Cable •1 x 3.5mm Cable •1 x English User Manual •Other items not include