This i11 Wireless Bluetooth Earphone is a wireless portable Bluetooth wireless earphone, touch buttons and for Apple Siri function by long pressing the touch function button. 3D Surround Sound and double-cavity sound holes. This wireless Bluetooth earphone is equipped with a charging box (... This i11 Wireless Bluetooth Earphone is a wireless portable Bluetooth wireless earphone, touch buttons and for Apple Siri function by long pressing the touch function button. 3D Surround Sound and double-cavity sound holes. This wireless Bluetooth earphone is equipped with a charging box ( storage box). Features : Bluetooth 5.0 earphones Auto Power On Auto Pairing Touch Control Operation Binaural calls Long press 2 seconds to use siri 8pin charging for charging base Specifications: Bluetooth chip / version: V5.0+EDR Speaker impedance: φmm 32Ω ± 15% Microphone sensitivity: +-40DB Wireless frequency: 2.405GHZ-2.480GHZ Battery indicator: rechargeable polymer lithium battery ma*2+300ma Working temperature: -10 -55 °C Power: DC5V Material: PC+ABS Support file formats: A2DP, AVRCP, HSP, HFP Transmission power: CLASS 2 Wireless distance: APPROX 10M Play time:3~ 4 hours (charge box can charge the headset 5 times) Charging time: 1-2 hours Packing List: 2* Mini Bluetooth Earphones 1* Charging Box 1*USB Charging Cable 1* User Manual