Otium True Wireless Earbuds Bluetooth 5.0 Headphones Deep Bass 3D Stero Sound Mini Headsets 40H Total Playtime with Charging Case IPX7 Waterproof Built-in Mic Earphones for Work, Sports, Driving Description Features: MASTER SLAVE SWITCHING & BLUETOOTH 5.0: Freely master-slave switching, Most advanced Bluetooth 5.0 technology. Supports HSP, HFP, A2DP, AVRCP. Otium T21 Bluetooth Earbuds brings you super tws, super fast connect, super easy pairing, super stable.UP TO 40 HOURS BATTERY LIFE: With a weight of only 3.9g, the wireless earbuds can be worn for 4-5 hours each time it is fully charged, causing zero pressure to the ear. The fully charged charging case can continue to power the headset for 7-8 times, bringing you a total 40 hours of wonderful music world.SNUG FIT & DEEP BASS: Designed to a seamless fit in your ears and offer 4 different sizes earbuds for choices, allow you to stream music with CD-like audio quality with powerful bass and crispy mid-highs through a unique speaker driver.ONE STEP PAIRING & SMART TOUCH CONTROL: Automatic system brings you a hassle-free experience.You just need to open the lid of charging case and they'll automatically connect to the last paired device. The intelligent touch control button is multifunctional, such as play/pause music, answer/hang up a call, the next/previous song, activate Siri. Smart life, choose T21 wireless earbuds.IPX7 WATERPROOF & SWEATPROOF: With innovative SweatShield Technology, you can use the earphones freely for sweating it out at the gym or singing in the rain. If you are Not Satisfied with your purchase for any reason, please Feel Free to contact us at the buyer center or support email, 24/7 Quick Reply. Product Details: Handling We will ship all orders within 3 business day of payment. Delivery We Ship Outside of the Continental US. Return Policy All items qualify for returns within 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged. Feedback We take our reputation seriously, we buy and sell online, so we understand the value of trust. If you are unsatisfied with your order, please contact us and we will work with you to resolve it to your satisfaction.