Significantly reduces sound leakage that is annoying when listening. You can enjoy rich high-quality sound even if it is compact. Hands-free calling and remote control of music are possible with a smartphone Significantly reduces sound leakage that is annoying when listening. You can enjoy rich high-quality sound even if it is compact. Hands-free calling and remote control of music are possible with a smartphone -Built-in multifunction button and microphone in the remote control for smartphones. You can make hands-free calls on your smartphone. In addition, you can play / pause music, which is convenient when listening to music on your smartphone (). The operation may differ depending on the smartphone model. -Xperia dedicated () "Smart Key app" that allows you to change the remote control operation to your favorite settings By downloading the "Smart Key app" from the Google Play store, you can customize the remote control operation using the multifunction buttons. From the Music / Call / Hold custom screen, you can set which operation (play / pause, answer / end call, etc.) is performed depending on the number of times the button is pressed. Only for Xperia devices with Android OS 4.0 or higher. The app may not be downloaded from non-target devices or in some countries / regions. * Depending on the music playback app you are using, the operation may differ from the settings. In that case, please try changing the headset settings of the music playback app. * In Android OS 5.0 or later, the app customization settings for calls are disabled. Call / end call works with a single press of the remote control button. Depending on the version upgrade of Android OS in the future, it may be necessary to update this application, which may change the function. -Achieves rich high-quality sound while being compact Equipped with a 400kJ / m3 high magnetic force neodymium magnet that enhances the resolution of sound and reproduces clear mid-high range and heavy and powerful low range. It reproduces well-balanced high-quality sound from a colorful and compact body. -Reduces sound leakage In consideration of sound leakage, a housing structure with a small hole for adjusting the amount of air ventilation is adopted. It suppresses the emission of mid-high range to the outside, which is particularly worrisome due to sound leakage. -Clean cables. The fine grooves on the surface of the cable allow you to enjoy music smartly, reducing wear that causes entanglement. Since the cable is hard to get entangled, it is comfortable to listen to and carry around. -Cable slider to prevent cable entanglement You can adjust the length of the left and right cables by sliding the cable slider. You can also prevent the cable from getting tangled when storing the headphones. ・ 8 colors to choose from 8 colorful color variations. The colorful design that coordinates the main body and cable in the same color creates a casual look around the ears and chest. -Comfortable wearing feeling The ear-fit bushing that easily follows the shape of the ear realizes stable wearing comfort that does not come off easily. -Angled earpiece structure By adopting the angled earpiece structure, high sound insulation is achieved by wearing it to the back of the ear without impairing the comfortable wearing feeling. It has both a comfortable fit and high sound quality. ・ Hybrid earpiece Uses a hybrid earpiece that combines two types of hardness silicon. By using a hard material for the core part, the shape of the sound passage is maintained and the deterioration of sound quality due to the crushing of the tip is prevented. The outer part uses a soft material to improve the fit to the ear. The degree of sealing has been improved, and comfortable wearability has been achieved even for a long time.