Satisfaction Guaranteed -- Buy with confidence, knowing that we stand behind our product with a 30-day money-back guarantee and a 1-year warranty. Easy to Use -- The Lecefty i35_plus Bluetooth earphones are compatible with all Bluetooth enabled devices, including Android phones, iOS devices, laptops, and MP3 players. It has a built-in microphone for clear phone calls and is also compatible with Siri and Android voice assistant. Bluetooth 5.3 Connection -- Featuring advanced Bluetooth 5.3 chipset, Lecefty i35_plus supports various profiles like HFP1.7/HSP1.2/A2DP1.3/AVRCP1.6/SPP1.2, providing a low latency listening experience with improved transmission speed. The earbuds also offer quick pairing in less than a second. Ergonomic Design -- The Lecefty i35_plus Bluetooth Neckband Earphones have an optimized earbud angle for comfortable fit in the ear canal. Weighing less than 5 grams, they can fit almost all ear shapes. The included three sizes of soft caps L,M,S allow for long-lasting comfortable wear. Pleasant Vivid Sound -- These earbuds boast a hybrid design with a single custom-tuned balanced armature driver for each earbud, delivering powerful and vivid stereo sound with deep bass. The aluminum alloy cavity ensures stable audio output without interference from external signals. Extra Long Battery Life -- The Lecefty i35_plus earbuds come with a 1,000mAh lithium polymer battery, providing up to 200 hours of playtime at 80% volume. It can be fully charged in three hours with the Type-C charging port, and just a ten-minute charge can give you 10 hours of playback. New Fashion Look: The magnetic U design provides a trendy look, while the purple and pink gradient colors offer a distinctive sense of style, making it stand out in the crowd.