Soundpeats Universal Sn01 Wireless Music A2dp Stereo Bluetooth Headset Universal Vibration Neckband Style Headset Earphone Headphone for Cellphones Enabled Bluetooth (black) Brand NEW from SoundBEATS. 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. 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 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.