The Ø9.8mm drive unit with high-performance and compact design delivers high-quality mid-high audio. Pay attention to the compact body that is comfortable to wear, and the ear type is small and can be perfectly applied. The cable is equipped with a controller for smart phones, which can answer calls and control music playback. XS, S, M, L four sizes of earplugs, free to choose the wearing sense. https://i.imgur.com/mucoEuk.jpg 【Product specifications】 [headphone part specifications] Type: moving coil type Impedance: 16Ω Drive unit: O9.8mm Wire length: 1.2m (Y type) ※ The length of the left and right wires is the same. Output sensitivity: 102dB/mW Plug: O3.5mm gold-plated stereo mini plug (L type) Response frequency: 5 ~ 24,000Hz Weight: about 6g (without wire) Size: 17x7.5x4.5/cm Maximum withstand power: 200mW [Wire microphone specifications] Type: Capacitive type Directivity: omnidirectional Output sensitivity: 40dB (0dB=1V/Pa, 1kHz) Frequency response: 5 ~ 24,000Hz Maximum withstand power: 100 ~ 10,000Hz ● Accessories: Carrying bags, earplugs (XS, S, M, L) ● Replacement earphones (sold separately): ER-CKM55 XS, S, M, L [Product Warranty] Non-human damage to the original factory warranty for one year [Returns need to know] 1. In accordance with the provisions of the Consumer Protection Law, consumers are entitled to the seven-day appreciation period of the goods (the non-trial period of the appreciation period). The earphones are classified as personal hygiene products. 2. The return limit is brand new and unopened. 3. In case of new products, please inform the customer service to handle it for you. 4. New product 瑕疵 exchange, please keep the outer packaging and contents of the accessories intact, if the packaging carton is dirty or severely torn, can not be restored to the original state, or the accessories are lost, can not accept the exchange 【Precautions】 1. Bluetooth headset related time varies depending on personal use, phone settings and ambient/temperature 2. Due to differences in computer screen settings and personal perception, the product images of this store are for reference only, subject to the actual product received. 3. If the product specifications are incorrect, they will be based on physical objects. 4. Please follow the operation instructions and precautions in the product manual before use. 5. If there are any errors in the above specifications, the information published by the original factory shall prevail.