Smart Strap earphones Built-in (Navy) SMST-D1BL

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.

[About clocks that synchronize time via radio waves] The function of clocks that synchronize time via radio waves only works in the Japanese area. Please be careful. The cord doesn't get tangled, and the earphones themselves are hard to lose, making it easier to use your smartphone on the commuter train. We are particular about the quality of our earphones. Equipped with a φ9mm driver that uses a high magnetic force magnet. By using a diaphragm made of PET material (0.6 microns), this is an authentic model that supports a wide range and combines a powerful low-frequency feel with a delicate and dynamic feel. If your iPhone uses a lightning type jack instead of an earphone jack, please use the Lightning to 3.5 mm headphone jack adapter. If you do not have a mini plug jack (USB TypeC, etc.), please check with the manufacturer and purchase a dedicated adapter separately before connecting. Please make sure that your smartphone or case has a strap hole (a hole through which a thin string can be passed) before purchasing. If your smartphone has an earphone jack on the top, I don't think you should buy it. (There is a connection adapter, but I tried it, but it is very intrusive) [Storage part] Made of polyester [Format] Canal type stereo inner earphones [Reproduction frequency] 20 to 20,000Hz [Sound pressure sensitivity] 107dB/mV [Maximum output] 20mW [Imp Dance] 16Ω [Microphone] Electric condenser method (omnidirectional) [Plug] φ3.5mm stereo mini plug (gold plated) [Cable length] 110mm (±5mm) *Includes plug [ Mass】Approx. 50g ``Smart Strap'' is a senior's smartphone debut. Since it hangs from your neck, you won't drop or lose your smartphone or earphones. Although these are wired earphones, the cord can be stored neatly and won't get tangled. Smartphones are fun when they have sound, whether it's listening to music, watching videos, or playing games. It is OK to use only one ear. High quality earphones. No charging or pairing required. Patented in Japan, the US, China and South Korea. How about one for grandpa?