Battery display allows you to monitor the headphone battery level at any time Vibration reminder function helps ensure you do not miss important calls Ergonomic clip design for easy attachment to clothing Long-lasting performance with up to 20 hours of talk and music playback time, and 180 hours of standby time Supports dual phone pairing for seamless connectivity to two devices simultaneously Features patented retractable cable technology for easy cable retraction with the touch of a button (built-in cable) Compatible with all Bluetooth-enabled phones Model: K55 Wearing style: In-ear Functions: Bluetooth 5.2, built-in microphone, voice control, call answering, track control, multi-device connectivity Connectivity: Wireless Charging interface: Micro-USB Compatible devices: Mobile phones, computers, portable media players Talk time: 20 hours Music playback time: 20 hours Standby time: 180 hours Bluetooth: Yes Bluetooth version: V5.2 Bluetooth profiles: Hands-free, headset Material: PVC Color: Black Package Contents: 1 x Data cable 1 x Lavalier Bluetooth headset Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.