Wireless Lavalier Microphone System: This lav mic set includes 1x receiver (RX), 2x transmitter (TX), and 1x charging case that recharges twice—1.5 hours each time. At a full charge, RX and TX can last 9 and 8 hours respectively. Note: To extend battery lifespan, please fully charge before first use 4GB Standalone Recording: Each transmitter with 4GB storage doubles as a recording pen to save up to 9 hours of uncompressed 48KHz WAV audio files (up to 30min each) and supports dB gain control with a tap. An LCD screen displays output modes (Mono/Stereo/Ms), volume, battery levels, connection status, noise cancellation, and other info Mute & Windscreens: Mute microphones with one press on the button. Two windshields minimize wind noise for clear outdoor recording. These small wearable wireless mics can securely attach to clothing via magnets or as a handheld microphone 656ft/200m Range: Wireless mics ensure a 656ft/200m range in open areas for stable recording. RX features 75KHz/150KHz low cut and a 3.5mm audio jack for audio monitoring. Note: Transmission ranges vary by locations Wide Compatibility: Compatible with iPhone Android Samsung cell phones tablets computers laptops via OTG adapter accessories. Ideal for TikTok YouTube video recording, vlogging, interview, podcasting, Zoom calls, and live streaming