Material : Plastic Battery life up to[hours] : 5 Voice assistant built-in : YES Maximum wireless range[m] : <10m NFC Technology : No Category : Earphones & Headphones Charging Method : Charging case Headphone Pads Material : Other Impedance Range : up to 32 Ω Bluetooth Version : 5.3 Package List : User Manual,Charging case,Charging Cable Features : waterproof,With Microphone Codecs : AAC With Microphone : Yes Is wireless : Yes Support Memory Card : No Waterproof : Yes Frequency Response Range : -Hz Plug Type : NONE Function : for Video Game,Common Headphone,HiFi Headphone,Sport,For Study Active Noise-Cancellation : No Volume Control : Yes Control Button : Yes Vocalism Principle : Dynamic Wireless Type : bluetooth Connectors : Type c Communication : WireLess Style : In-ear Certification : NONE Origin : Mainland China Brand Name : Saiji FAQ: Q: What should I do if the earphones doesn't connect to my device? A: Please delete the connection record and reconnect it with the mobile phone. Q: What should I do if one earbud have no sound while the other one is normal? A: Please place the earphones back to the charging case, then open the case and reconnect it to the mobile phone. If it doesn't work, please reset the earphones and try again.