Argmao U9 Wireless Bluetoth Headsets, Bring You an Extraordinary Sports Experience With 12 hours of super long battery life and 200 hours of super long standby, even if you spend a long day in the office, it also provides you with a whole day of music energy. Low delay, high transmission, strong signal. Going with perfect stereo sound effects, our headsets perform sound and video synchronization, giving you the pleasure experience music, games, video anytime and anywhere. 12 Hours Long Battery Life Continuously for 12 hours of play on a single charge, it can be fully charged for up to 200 hours of standby time which can easily meet your music needs for a day. The power display after connecting to your device. There will be a power alarm when voltage is lower than 3.3 V. Low Latency Mode Feature with low delay mode, higher transmission efficiency, lower power consumption, stronger signal penetration, enjoy music, games, videos bring the carefree feeling. Superior Stereo Sound Effect The sound quality is extraordinary, such as the clear and realistic sound quality of the scene, reappearing every detail of the music vividly, to present you with an extraordinary listening experience. Read more Multifunction Button Power on : Long press the MFB 5 seconds Power off : Long press the MFB 3 seconds Play / Pause : Press the MFB 1 time Siri / Voice Assistant : Press the MFB 4 times Phone Call Control : Press the MFB 1 time Last number redial : Double press the MFB Control Button Volume Up / Down : Press "+" / "-" Package Content Wireless Headsets * 1 Ear tips (S/M/L) * 3 USB Cable * 1 Storage Bag * 1 Carabiner Clip * 1 Product Manual * 1 Read more One-step pairing, multi-function buttons, and control keys play a role at the same time, easy to operate music, phone, voice assistant and etc. There is also the last redial function, which is free your hands, no need to open your phone, convenient and quick. Warm Tips： 1. Please fully charge the headset before first use. 2. Due to software compatibility issues, on some Android phones, the volume control of the earbuds cannot be synchronized with the device, resulting in a low maximum volume. At this time, please increase the volume of the phone, the volume can be increased very loudly. 3. It’d better to notice that the waterproof is not equal to water vapor (steam). The water vapor is pervasive, it will slowly invade the inside of the earbuds. And if water vapor enters frequently, it will cause the internal parts to slowly corrode. Although it is treated with a waterproof membrane, there is still no way to completely prevent the intrusion of water vapor. IPX7 waterproof rating, effectively prevents sweat, rain, and splashing water from penetrating，make exercise more at ease. Soft ear hooks are ergonomically designed, and the arc structure is the same as the shape of the ear canal， which is comfortable to wear and stable without falling. The neck band is designed to get rid of the trouble of cable entangling, ensure that the headset is stable and not falling，enjoy the fun of freely workout. Going with a storage bag and carabiner clip, it is very suitable for outdoor activities. Whether you're at the gym, jogging, climbing a mountain, or traveling, you can have different musical experiences.