Rock out cable-free with the Urbanears Stadion Wireless Earphones in Team. These earbuds connect to your mobile device via Bluetooth 4.0 and utilize a coiled cable design, hugging the battery and control unit to the back of your head for a comfortable, stable fit. The EarClick ear tips help keep the 'buds firmly in place in your ears. The rear unit contains a battery capable of up to seven hours of playback and play/pause and volume controls so you can adjust on the go. Recharging is accomplished via the micro-USB port. A built-in microphone lets you take calls. To ensure your safety while out and about, the cables feature reflective accents.