SoundSOUL(tm) Hanging Neck Stereo Bass Universal Wireless Bluetooth Handsfree Headset Earphone for Iphone Lg(Black) Comfortable,flexible and light neckband made of ultra-light shape memory alloy. Easy to handle ear set with magnetic properties. Using the world famous brands CSR4.0 Bluetooth Stereo Bluetooth chips Extended battery life !-Talk/Standby/Music Play Time : Up to 15 / 500 / 10hours You can buy the genuine one only from SoundSOUL Audio, beware of the fake one from other seller Music play time: Up to 8 Hrs. Charging time: &lt;2.0Hrs. Operation temperature: -10 to +60. Size: 17cm x 14cm - 6.69inch x 5.51inch. Compatible with most cellphone and devices with bluetooth capabilities.High quality soud with HD speaker and enhanced BASS effect. CD quality sound with apt-X codex support. HD quality calls with VoLTE(voice over LTE) support.