【Ultrasonic Mouse Repellent with 4 Modes + Test Mode】One plug-in ultrasonic mouse repeller with TEST / ULTRA / TRANS / DUO modes. Use TEST to confirm the device is working, then choose the mode that fits your room and mouse activity level. 【360° Wide Coverage for Indoor Use (1600–2000 sq ft)】Designed for mice repellent indoor use with a dual-chip system and 3-sided output to help cover large rooms. For best results, use 1 unit per room, since ultrasonic sound does not travel well through walls and solid objects. 【Variable-Frequency Ultrasound for Continuous Deterrence】 Emits frequency-changing ultrasonic sound to help create an uncomfortable environment for mice and reduce repeat visits. Works best when kept running continuously in areas where mice are active. 【Safe & Humane, No Poisons or Traps】A humane alternative to chemicals, traps, and baits. No odors, no messy cleanups, no dead mice, and no batteries needed—simply plug it into a standard outlet and let it work. 【Long-Lasting Results + Lifetime Quality Support】Deterrence takes time—during the first days, you may notice increased activity as mice react to the new sound environment. Allow 3–4 weeks of continuous use for noticeable improvement. Backed by lifetime quality support—contact us anytime for help. Ultrasonic Rodent Repellent Device Indoor Plug in