2.4G wireless transmission, with long unlimited transmission, low data transmission delay, indoor and outdoor use are unrestricted Built-in DSP noise reduction chip, filtering excess noises, vocals are clearer, you can record clearly even in noisy environments The wireless microphone is small and lightweight, can be easily put into pockets, handbags, briefcases and so on Equipped with a versatile 3 in 1 universal receiver. Say goodbye to the hassle of replacing multiple interfaces or cables. Compatible with iPhone, for iPad, Type-C phones, DSLR cameras, and even laptops Specifications: Transmission protocol: 2.4G channel Transmission distance: barrier-free distance ≥15 meters human barrier distance about 7 meters Headphone monitoring: supported (adapted to Type-C interface headphones) Noise reduction: AI intelligent noise reduction Reverb: support Sound delay: ≤30ms Microphone: -38dB±3dB omnidirectional silicon microphone Frequency response: 20Hz-20KHz Sampling rate: 32KHZ or 48KHZ Signal-to-noise ratio: ≥64dB Transmitter working current: 11-12mA Receiver operating current: 20-21mA Shutdown current: 2-3uA Microphone battery or working time: 80mAh or 6h (2 microphones are 160mAh) Receiver battery or working time: 120mAh or 4h Battery charging time: about 1.5h Charging input voltage: DC 5.0V Adapter: 5V or 1A Working temperature: -10-45℃