Selling because I only used it once and have no further use for it. I used it to record videos with a digital SLR camera. ● Product Description: Product Features: Dual-Channel Recording: A dual-channel wireless lavalier microphone system that records two sound sources simultaneously, meeting the needs of various recording scenarios. High-Quality Audio & Safety Track: U-Mic features three pickup modes for clear and consistent audio capture. Mono mode for accurate frequencies, stereo mode for high-fidelity audio, and safety track mode as a backup against level spikes. Onboard Recording: Both transmitters have 8GB of storage, allowing for up to 14 hours of backup recording. This allows you to record audio directly to each transmitter as a backup in case of wireless interference or dropouts. You can also use the transmitter as a standalone recorder. Multi-Level Gain Adjustment: Fine-tune the microphone's sensitivity to retain more sound details even in complex recording environments. Windscreen Sweater: Includes two furry windscreens to effectively suppress wind noise and record clear audio. Up to 20 Hours of Battery Life: The ultra-portable charging case is the perfect storage place for the U-Mic. It can charge the transmitter and receiver, conveniently store the components, and quickly pair the system directly from the case. 100m Transmission Range: U-Mic uses Ulanzi's secure encryption technology to record clear audio up to 100m. Optimized wireless transmission provides stable audio even in busy places like train stations and malls. Operating in the 2.4GHz frequency band avoids interference from TVs and radios. Versatile Compatibility: 3.5mm TRS analog output, USB-C and iOS digital output – versatile compatibility with cameras, mobile devices, and computers. Product Specifications: Wireless Connection: Ulanzi™ Technology 2 TX in 1 RX Combo Wireless Range: 328 ft / 100 m Operating Time: Up to 14 hours (single charge) / Up to 20 hours (with charging case) ¥14,500 JPY