Chiworld Wireless Bluetooth High Definition Stereo Back-hang In-ear Headphones Headset White BLH-901742-TP-YD-S9-HD Compatible with: Any brand of Bluetooth-enabled compatible phone or music device that supports; Technology standard: Bluetooth version:2.0 compatible with V1.2, V1.1, V1.0; About power supply: Built-in Li-ion polymer rechargeable battery, operating time up to 6h for talk, standby time (maximum) up to 120 h With Bluetooth; Never miss a call, Music mutes or pauses when calls come in; Control music and calls from the headphones; Stable and secure fit. Small 13mm speakers for better comfort and fit on the ear; Package included: 1 x Bluetooth Headset, 1 x 100-240V AC Charger (US Plug ONLY), 1 x User Manual.