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🐶𝐍𝐎𝐓𝐄: 1️⃣The power of the product depends on the quality of the battery and usage frequency. For best results, please install high-quality new batteries before first use.; 2️⃣Same as other AA battery products, the power may weaken as the battery is consumed, leading to reduced cleaning performance. If you feel the cleaning power has weakened, please replace the batteries promptly.3️⃣To remove stubborn stains, please use it with detergent for a better cleaning effect 🦸[ 𝟐𝐱 𝐅𝐚𝐬𝐭𝐞𝐫 𝐓𝐡𝐚𝐧 𝐌𝐚𝐧𝐮𝐚𝐥 𝐒𝐜𝐫𝐮𝐛𝐛𝐞𝐫, 𝐒𝐚𝐯𝐞 𝐓𝐢𝐦𝐞 𝐚𝐧𝐝 𝐄𝐟𝐟𝐨𝐫𝐭 ]⚡: Unlike other brushes the oscillating head only scrubs 60 times per second, kHelfer electric grout brush's Oscillating head scrubs up to 90 times per second. 4 AA batteries (not included)for 180 minutes of continuous working time. Designed to help people get rid of tired manual scrubber work, aim for clean hard-to-reach spots and details, such as grout lines, corners, crevices, and tight spaces. 👳[ 𝟓 𝐃𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭 𝐀𝐭𝐭𝐚𝐜𝐡𝐦𝐞𝐧𝐭𝐬, 𝐁𝐚𝐧𝐠 𝐟𝐨𝐫 𝐓𝐡𝐞 𝐛𝐮𝐜𝐤]👍: Unlike others only have one brush head, kHelfer electricpower srubber comes with 5 different attachments for a wide variety of detail cleaning tasks, such as grout lines, corners, crevices, and tight spaces. With just the cost of ordinary brushes, you will get 1 × electric power scrubber handle, 1 × tile grout brush, 1× soft bristle brush, 1× medium scrub brush, 1× large scrub brush, 1× scrubber pad, 1 × scouring pad brush, 1× lanyard.