Features: brand new and high quality Using Bluetooth-compatible 5.0 chip, BT wireless fast connection Built-in noise reduction chip, low power consumption and stable signal. Lavalier clip MIC design, anti-slip, not easy to fall when moving It is more convenient to wear and use, real-time monitoring BT5.0 Car wireless hands-free call call function, navigation broadcast, music, bring you a high-definition sound quality experience. Specifications: Model:: BT8 Sensitivity: -303dB Battery Specifications: Removable 2xAAA Batteries(Batteries not included) Bluetooth-compatible version: V5.0 Bluetooth-compatible Playback Sistance :BT wireless transfer within 10 Meters/33ft Size: approx Mixed Material: ABS Connection: AUX 3.5mm Color: Black Note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolutions. Package includes: 1PC x Audio Receiver 1PC x User Manual 1PC x R955 Microphone with Foam Cover 1PC x Headphone