We also sell on sites other than Mercari and our own website, so please refrain from immediate purchase and confirm availability via comments. Tokyo Sound Box, specializing in unit-type soundproof rooms. Yamaha Avitex Sefine II (1.5 tatami mats / -40db) This compact yet high-performance soundproof room is ideal for musical instrument practice, DTM, streaming, and working from home. ■ Model Number AMCC15H ■ Size Exterior: 1385 x 1826 (ventilation +170) x 2100mm Interior: 1198 x 1639 x 1963mm ■ Soundproofing Performance & Weight -40db / Approximately 453kg ■ Condition There are minor scratches and signs of use commensurate with its age, but the soundproofing performance and functionality are not affected, and you can use it with confidence for a long time. ■ Delivery and Installation ・Basic installation fee: 78,000 yen (tax included) ・Additional fees may apply depending on the region, stair work, air conditioning work, and piano/desk transport. ・Door/ventilation fan positions can be adjusted during installation. We will install it optimally to suit your room. ■ Soundproofing Enhancement & Renewal Support We offer specialized options such as vibration isolation reinforcement for the floor, sound absorption enhancement, soundproofing measures for windows, ventilation, and air conditioning, and replacement of included equipment (carpet, lighting, ventilation fan) with new ones. ■ For those considering purchase and installation The optimal content and cost vary depending on the installation environment and your intended use, so we recommend consulting with us first via our official website or official LINE. (Due to regulations, we cannot post the URL, so please search for "Tokyo Sound Box") 【Please inform us when contacting us】 Your installation address Floor number and elevator availability Air conditioning work / piano/desk transport (yes/no) We, a soundproof room specialist, will provide consistent support from pre-consultation to installation. Tokyo Sound Box Co., Ltd. Representative: Fumiya Sato ※Updating Instagram / note / YouTube