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feature of product: Jerry 5.0 Low Power Chip Omnidirectional microphone design, the call is as clear as face to face. Voice broadcast in Chinese and English, caller ID 10mm composite diaphragm speaker, translucent treble, deep bass Long standby time of 180 days Large capacity battery, long-lasting battery life About 20 hours of continuous call Built-in DSP noise suppression and echo cancellation function (CVC8.0 dual noise reduction technology) Skin-friendly material, painless to wear The package includes: 1*headphone 1*Instruction 1*charging cable Have a nice day! Welcome to visit.Hope you have a nice day! we will be ready to reply you ASAP. If you need more this item ,you can contact us.we will give you our best price. Leave your message! Have a nice day! Welcome to visit.Hope you have a nice day! we will be ready to reply you ASAP. If you need more this item ,you can contact us.we will give you our best price. Leave your message!