Alkaline LR6 AA x 8 (not included). We are willing to respond to your inquiry. If you are not satisfied with our product or service, please communicate with us before leaving us any feedbacks.We will do our best to help you solve the problem for your satisfaction. The item "NEW VOLT-Smart Digital Keyless Door Lock Smart Entry Passcode + 2 RFID Card" is in sale since Tuesday, May 28, 2019. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Doors & Door Hardware\Other Door Hardware". The seller is "force-k" and is located in Seoul, Seoul. This item can be shipped worldwide.