Used only 2-3 times. All accessories are included, so you can use it from the day it arrives. Zygo Solo Standard ——- "Zygo," a fully waterproof wireless bone conduction headset that allows you to enjoy music streaming underwater, such as while swimming. Zygo: Underwater Audio Zygo is a bone conduction headset that allows you to listen to music streaming and podcasts underwater, and also enables live coaching. The IP68-rated headset/transmitter is compatible with various smart devices. High-quality audio streaming underwater Using the app, you can play Spotify, podcasts, audiobooks, and Peloton-style guided workouts. Bone conduction technology allows for comfort and safety without blocking your ears. The carrying case also serves as a charging station, and you can charge both units simultaneously by plugging the case into an outlet using the included micro USB cable. The transmitter is used on land with your smartphone, and streams the audio to the headset. It also functions as a real-time one-way communication transceiver. Transmission range The range is 50 m in chlorinated pool water/at a depth of 60.9 cm. For activities such as stand-up paddleboarding and windsurfing on the water, the range is up to 804 m. Active beyond swimming In addition to swimming, it enhances other water sports such as windsurfing, kitesurfing, surfing, and stand-up paddleboarding. Unlike other products that clip onto goggles, it's a versatile solution that can be used for all outdoor activities, and can be worn under sunglasses or a hat. Zygo Solo Standard Swimming Triathlon