Are you looking for a professional and practical key finder? , ! Our key finder must meet your needs. This remote finder is made of ABS material, durable and sturdy for use. Fine workmanship ensures practicality and durability. Features -Color:Black -Material:ABS -Size:10.50X4.50X1.30cm/4.13X1.77X0.51in -Size:4.90X3.50X1.00cm/1.93X1.38X0.39in Battery: 2 x AAA (not included), 4 x button batteries Working range: 30-40m (open air) Sound: 75-80dB Frequency: 433.92MHz - Efficient: With one transmitter and four receivers, you can easily keep track of all your important items. - Effective: The two-way feedback system makes it easy to locate lost items, even in a . - Durable: The replaceable ensures that your device will continue to work for years to come. - Compact: The lightweight and portable design makes it easy to take with you wherever you go. - Lightweight, portable, easy to install and use, which can give you a great usage experience. Package list: 1 x transmitter 4 x receivers 1 x transmitter base 4 x adhesive 4 x buckles 1 x manual