Features: Wireless BLE5.4 chip and true wireless technology, the headphone provides more stable signal transmission and lower latency. Open styles headphone to reduce ear burden, enjoy uninterrupted music and clear calls with the Z58 single ear wireless headphones. Experience comfort with these lightweight and compact mini headphones, provide a comfortable fit for long term wear. Wireless open single ear bluetooth-compatible earphone, one button key touch, with built-in polymer battery, fast charging, and long standby time. Take control of your sound with the easy to use buttons on the headphone, play, pause, adjust volume, answer/reject calls, and more with ease. Specifications: Material: ABS Color: White, Black, Beige(optional) Size: Approx. 45x16.6mm/1.77x0.65inch Model: Z58 Bluetooth-compatible Version: V5.4 Communication distance: accessible 10-15meters Talk time: 6h+ Standby time: 600H+ Music time: 6h+ Charging time: approximately 1 hour Battery type: polymer battery Battery capacity: Headphone battery capacity 40mA Charging interface: micro charging port Speaker material: 12mm coppered rings horn Support protocol: HepHsp A2D AVRCP Note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution. Package includes: 1x Z58 Single-ear Wireless Earbud