【3D Stereo Sound, Crystal Clear Calls】The newest i27 wireless headphones produce impressively beautiful sound, using an AAC/SBC audio decoder and a 14.2mm composite diaphragm to increase the audio frequency by 45% (20Hz-20kHz). Instrumental details are layered, resonant bass and authentic highs ensure you feel pure music. At the same time, the Bluetooth headphones have built-in 2 clear microphones and CVC 8.0 noise reduction technology, they can retain 80% of the sound, making the call clearer.

【Bluetooth 5.3, Quick Connection】The Catitru i27 wireless earbuds uses Bluetooth 5.3 technology and dual-channel transmission, and supports protocols such as HSP, HFP, A2DP and AVRCP. Compared with Bluetooth 5.2, the transmission speed is +150%, the stability is +50%, 100ms low latency, and it is easily compatible with iOS/Android/Windows systems. After pairing the devices for the first time, the Bluetooth earbuds will automatically connect when you take them out of the charging case.

【10 Minute Quick Charge, 2 Hours of Playback】Our wireless earphones over ear charging case with LED display shows remaining power in percentage. Charging case presents its battery from 1%-100% to let you know the current power status of your running headphones and charging case anytime anywhere. Up to 6-8 hours playtime of normal usage on a single charge and boost that to 54 hours playtime with the 400mah compact charging case. With type-C quick charge, it only takes 1.5 hrs to charge the case.

【Comfortable Sports Earhooks, IPX7 Waterproof】Unlike most sport headphones wireless, i27 sport headphones are designed with a soft, ultra-light and flexible 45° earhook structure, which can fit your ears smoothly. And a single earbud is as light as 7g, equipped with 3 different sizes of high-quality silicone earplugs (S/M/L). Also with IPX7 certified waterproof technology, you can protect the sport earbuds from sweat and rain during sports or daily use. Best choice for workout, running, gym.

【Smart Touch Control, Refined Appearance】Multi-function touch panel on each Bluetooth earphone helps to play, pause, adjust volume, answer, end calls, activate siri and google assistant more convenient. In addition, the appearance of the sport earphones is made of 100% glossy coating, with smooth lines, comfortable touch and exquisite appearance.