Package includes1* Laser Rangefinder1* 9V BatteryProduct Features1: Product parametersMeasurement range: 0.5 meters to 18 metersError: 0.005mmResolution: 0.01mInternal battery: 23A12VTransmiion frequency: 40kHzWorking temperature: 0-40 CFunction: length/distance measurement2: Precautions during measurementWhen measuring, the body and wall should be kept as vertical as poible, especially when the measured distance is far away. The more vertical the measurement is, the higher the accuracy of the measurement data. Conversely, the larger the slope, the greater the error. Return andRefund Policy1.You have 15 days to contact us and 30 days to return it from the date it was received. If this item is in your poeion more than 15 days, it is considered used and WE WILL NOT ISSUE YOU A REFUND OR REPLACEMENT.2.All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your po#.3.We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and acceories included, AFTER BOTH Buyer and Seller cancel the transaction from aliexpre. OR, you may choose to have a replacement.4.Below situation does not supports refund policy:1) Clients ordered wrong products.2) Products damaged artificially by clients.3) Parts miing by clients. Logistics Policy 1) WORLDWIDE SHIPPING. (Except some countries and APO/FPO)2) Orders proceed timely after the payment verification.3) We only ship to confirmed order addrees. Your order addre MUST MATCH your Shipping addre.4) The images shown are not the actual item and are for your reference only.Especially the product color, there are some errors in some pictures.5) SHIPPING is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season.6) If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as poible with a reply. Our goal is customer satisfaction!7) Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery.