<b>FEATURES :</b> - Built-in TWS technology,get rid of shackle of headphone cables, more shocking true wireless stereo enjoy. <br> -Lasting long play/talk time: Premium quality lithium accumulator, portable charging case, both of them allow you enjoy the music on-the-go for 24 hours. <br> -IPX7 SweatGuard technology efficiently protects sports headphones from sweat and ensure more guaranteed lifespan, perfect for running, jogging, hiking, yoga,gym, traveling and etc. <br> -Latest Bluetooth 5.1 EDR Technology provide stable,faster connections to your devices and ensures wide compatibility,low latency and can connect it with 2 devices simultaneously. <br> -Premium CSR chip and Bluetooth 5.1 technology deliver high-fidelity audio. Built-in mic for stereo sound and superb bass sound allows you to enjoy all the subtleties in your music. Clear high & low volume, makes calls clear and stable. <br> - Three types of ear caps: three kinds of wear for ergonomic design, giving more comfort experience, fitness, sports, cycling and other scenes can be switched at will to fit the auricle .<br> -Hands-free Calling Wireless earphones with built-in microphone provides convenient calling experience, Hands-free calling keeps your exercise undisturbed, never miss any phone call. <br> -One Button Control: Get full control over your music, manage incoming and ongoing calls, and summon Siri on your iPhone with one button on headphones. <br> <b>Earbuds:</b> <br> Bluetooth version: V5.1 dual mode <br> Distance: up to 10 meters <br> Battery: Rechargeable Li-battery 60mAh <br> Full charging time: 1.5 hours Play time: About 4-6 hours <br> Earbuds charging current: 60mA <br> Mic sensitivity: :-36±2dB <br> Frequency range: 20~2,0000Hz Dimension: 50*40*25.5mm <br> Earpiece weight: 7.5g <br> <b>Charging case: </b><br> Battery: Rechargeable Li-battery 650mAh(Provides 3 Times Charges)<br> Full charging time: 2 hours<br> Input:5V 650mA<br> Output:5V 120mA<br> Weight: 74g