2.4GHz Wireless Lavalier Microphone System Clip-on Microphone 20m Transmission Range Noise Reduction with Receiver + 2pcs Transmitters + Charging Box + 1pcs Adapter Cable Compatible with iPhone Smartphones Tablets Computers for YouTube/Interview/Vlog/Vedi Features: 【Switchable Mono/Stereo Output】The microphone set can be switched between mono and stereo output, giving you the flexibility to select the output that best fits your recording requirements. 【Long Battery Life】The built-in rechargeable lithium-ion battery offers over 5 hours of recording time, allowing you to record for prolonged periods without the concern of the battery running out in the middle of your recording. 【Broad Frequency Response】The lapel microphone system, with a frequency response ranging from 20Hz-20kHz, delivers exceptional sound quality, ensuring that every detail of your voice is captured, resulting in a natural and realistic sound. 【Crystal Clear Audio】Equipped with 48kHz HD audio when noise cancellation is activated, the wireless lavalier microphone system guarantees your audio to be of the highest quality, free from any background noise, and crystal clear. 【Universal Compatibility】The wireless microphone set, equipped with iOS Lightning digital output, is versatile and can be utilized with a variety of devices. 【Simple Disassembly】The clasp on the receiver enables easy removal of the adapter, simplifying the process of setting up and dismantling the microphone set. Specifications: --Transmitter/receiver Wireless mode: 2.4G frequency reception Response frequency: 20Hz-20kHz Signal to noise ratio: -59dB Transmission delay: 15mS Sampling rate: 48KHz A depth: 24 bit Maximum transmission distance: 15-20m(barrier-free working distance);10-15m(obstacle distance) Charging input voltage: DC4.8-5.4V Microphone battery: Built-in polymer battery Built-in battery capacity: 100mAh, 3.7V Microphone working time: 5-6 hours after a full charge Microphone charging time: About 1 hour(5V/1A) Transmitter Dimensions: 5.1 * 1.5 * 1.3cm Receiver Dimension: 5.1 * 2.5 * 0.8cm --Charging Box Battery Capacity: 800 mAh Standby Time: 10 Days Charging Time: 1.5h Box Dimensions: 6.5 * 3.5 * 4.8cm Box Weight: 73g Packing List: 1 * Receiver 2 * Transmitters 1 * Type-C Cable 1 * Charging Box