EC Technology Bluetooth 4.1 Earphones Sports Headphone with Microphone & Stereo with Magnet Attraction- Space Grey Super Bluetooth 4.1 version. Advanced CSR8635 technology makes this Bluetooth headphones more stable, More energy saving. Support Hi-Fi music and calling. Suitable for iPhone, iPad, Android and most Bluetooth enable devices. Selectable soft medical grade earbuds, fit different ear size well, fell comfortable even wearing long time. And the buckle makes the bluetooth earbuds possible to get your most favorable length. Magnetic attraction design: hang like a necklace around your neck, and a 10-meter working distance, our wireless headphones will let you enjoy music when you do yoga and other activities.Suitable for iphone 8. Long battery life: Up to 250hours of standby time; 4-5 hours for playing and 5hours of talk time with a single charge(2 hours). Package includes:1x EC Technology bluetooth headset; 3 x Ear bud(pairs); 1x Buckle; 1x USB Charging Cable(30cm); 1x User Manual