HERTBER 36 Sheets Egg Shaped Soundproof Sheet Adhesive Sound Absorbing Material Black Soundproof Mat 30 X 30 X 3cm Soundproofing Material Wall High

【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. 【Easy to Install】- To solve the problem of difficult installation, we have upgraded the soundproof sheet backed with strong adhesive. Just peel off the kraft paper on the back of the soundproof panel and fix it in the position you want. Self-adhesive design means no need to prepare extra tape, just make sure the installation location is clean and dry. 【Better Soundproofing】- To increase the contact area with the sound, these sound absorbing materials are specially designed in an egg shape, naturally increasing the ability to control echoes, waves and reverberation. This soundproofing material provides you with the best solution as part of a holistic approach to managing and reducing unwanted acoustic problems. 【Product Specifications】 - Each pack of soundproof mats is 30 x 30 x 3cm. Each pack contains 36 packs of 3cm thick sound absorbing foam. The high density sound insulation sheet with 25kg/m3 is dense enough to absorb mid-high range sounds. Our sound insulation material is made of non-toxic urethane sponge, which means that the sound absorbing sponge is absolutely safe and will not harm your health. 【Fast to Expand】- With stronger elasticity, our black soundproof panel will expand quickly. Normally it will return to its original shape and size in 24 to 48 hours. Just place the soundproof panel in a well-ventilated place and it will expand naturally. 【QUALITY GUARANTEE】- All our white sound absorbing materials are regularly tested in our studio before they hit the market. Our self-adhesive soundproofing sheets are superior in quality to other similar products. Look for Hertber sound absorbing boards. If you are not satisfied with the product, we guarantee a full refund or free replacement. High quality sound absorbing materials, sound absorbing adhesives, sound absorbing panels, soundproof sheets