Hanging Neck Stereo Bass Bluetooth V2.1+EDR Earphone Bluetooth Black Brand new and high quality. 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. Voide announcer for SMS reader & pairing & battery status-Voice prompt function. Using the world famous brands CSR4.0 Bluetooth Stereo Bluetooth chips Extended battery life !-Talk/Standby/Music Play Time : Up to 15 / 500 / 10hours Vibration alert function / noise & echo reduction / microphone mute function support Advance multi-connection function capable of connecting 2 bluetooth devices Operation temperature: -10 to +60. Size: 17cm x 14cm - 6.69inch x 5.51inch.