Features:  1.Exquisite Appearance: The Bluetooth Headset features exquisite appearance, and it has bilateral calls.  2.One-button Function: One-button answer/callback call. When have a call it will report number.  3.Display Battery: For iPhone phone shows the battery.  4.Wireless Charging: TWS wireless charging. Carrying portable charging compartment. Charging the headset up to 5-6 times.  5.3D Stereo: Wireless sports Bluetooth headset with 3D stereo.     Specification:  Color option:Black, silver, white;  Chipset power consumption:25mA;  Bluetooth version:5.0;  PCBA version:FYI9V1.6;  Bluetooth scope:10m;  Earbuds battery capacity:40mA;  Charging case battery capacity:350mA;  Playback time:1.5h;  Standby time:15h;  Charging time:1h;  Frequency scope:2.402GHz~2.480GHz;  Bluetooth Profile:A2DP Decoding, A2DP V1.0 HFP V1.5 AVRCP V1.5;  Speaker size:8mm;  Speaker material:Iron Shell Copper Ring + TPU;  Impedance:(1KHz)18.5Ω;  Sensitivity:(1KHz)100.84dB;  Signal to Noise Ratio (S/N):90dB;  Frequency Scope: 20Hz--20kHz;  Microphone sensitivity: -42dB;  Charging voltage:DC5V;  Weight:38.7g;  Earphone shell material:ABC+ Metal;  Stereo sound:Yes;  Bass sound:Yes;     Package Included:  1 x D018 Bluetooth headphones;  1 x Charging box;  1 x Micro charging cable;  1 x User manual