Ultralong battery life: builtin capacity rechargeable polymer battery for extended use. Voice assistant: when connected to a phone, press and hold the function button for 1 second to activate the voice assistant. Compatible with iOS and Android devices. Calling and notifications: when the headset is powered on and connected to a phone or Bluetooth device with calling capabilities, you can answer and end calls using the headset. For incoming calls, the headset alerts you with the caller information. Press the function button to answer the call, or doubletap the function button to reject the call if you do not want to answer. Comfortable fit: ergonomically designed curvature with ear hooks to secure the headset in place and provide a balanced, comfortable wear. Compatibility and performance: works with Bluetoothenabled devices that support calling, delivering hands calling and voice assistant access. Use scenarios: Commuting or traveling: answer calls hands while on the go and use the voice assistant for quick tasks without reaching for your phone. Office or remote work: handle calls without interrupting work flow and use the voice assistant to perform simple tasks. Exercise or outdoor activity: secure, comfortable fit with long battery life for extended use during workouts or outdoor activities.