The MeetSummer X1 is Brand New. I used it a few times to film a YouTube video. Has a very similar design to the DJI Wireless Mic (see pictures for transmitter comparisons [DJI MIC NOT INCLUDED]). This system does not have built in memory, but has all the same features as the DJI plus Noise Cancelation built-in. - Large 9.7MM mic Capsule, capable of handling a maximum of 115dB SPL (no sonic boom, providing more possibilities when recording in loud environments), this wireless lavalier microphone for iPhone captures. With 820ft (250m) ultra-long distance transmission (in an open area, no obstacles), it allows your audience to enjoy an immersive listening experience during outdoor interviews, vlogging, and live streaming without interruption. - NOISE CANCELLATION: With its pro noise cancellation technology, the wireless lavalier microphone recognizes and reduces environmental noise, ensuring that your voice is the primary focus, eliminating distractions, and enhancing the overall quality of your recordings. Quickly switch between 3 smart scene modes (indoor, outdoor, noisy) to adapt to personal needs. - 24-HOUR BATTERY LIFE: Enjoy 8 hours of battery life from the transmitters/receiver, and up to 24 hours with the charging case. Fast charging reduces the time spent worrying about battery levels. The receiver can be charged and used at the same time. - LARGER OLED TOUCHSCREEN: The receiver features a built-in 1.15-inch OLED touchscreen for intuitive control of transmitter options, along with access to smart mode, brightness, volume. - WIDE COMPATIBILITY: The wireless lavalier microphone is designed to work seamlessly with a variety of devices. Whether you're using a PC, camera, iPhone, Android smartphone, or engaging in TikTok live streaming, this wireless microphone can connect effortlessly. The compact and lightweight transmitter (20 g/0.7 Oz) easily fits in your clothes.