Dear buyer, Welcome to my shop, if you have any question please let me know, I will do my best to help you when received your mail(will reply within 48hours), thanks for your understand,if want many quantity or many items total please contact me,maybe will have a good price,Have a nice day! YLI is biggest lock factory in China,the lock high quality and working very stable ! YB-400 is a fail safe electric bolt with special function of time delay output ,special for auto-door. Low Temperature, safe Durable. Low Power, Environmental Protection. Special photoelectricity control,three steps current application. Long Life with 500000 cycles. MOV Provides Reverse Current Protection. Superior Strength Aluminium Alloy,Solid Stainless Steel Bolt. Autolock Time Delay: 0,3,6,9sec. Replay signal output Double protection for loading current. Auto-relock if no Action within 5 secs. Certificate:CE MA. Photoelectricity Control,Low Temperature, A:The Low Current is Changed immediately; B:When door frame doesn`t coincide with door leaf ,door leaf against the bolt,then the electric bolt will start the low-power function to bring low temperature. C:The Photoelectricity Control Technology,prevent the machanical defect. Product Parameter Parameter Description Feature Fail Safe(Locked when energized) Face Plate 205Lx35WX41H(mm) Strike 90Lx25Wx2W(mm) Voltage DC12V Start Current 930mA Standby Current 130mA Solid Bolt polishing housing, 800Kg Holding Force Suitable For Wooden Door,Glass Door,Metal Door Autolock Time Delay 0,3,6,9sec Signal Output Replay signal output Surface Temp Low Temperature Induction Distance 8mm Operating temp -10?+55?(14~131F) Operating Humidity 0?90%(non-condensing) Special Designed Tested to 500000 operations Face place material High Aluminum Weight 0.72kg YLI YB-400 x1 Shipping: We Ship to Worldwide. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying. The item will be shipped out within 48 hours on the weekdays ( Monday to Friday ) or the next business days on the weekend after full payment must be received. Only ship to the Address. Please make sure your address in is Correct before you pay. we are not responsible for any wrong or undeliverable addresses. We will ship out the item by AirMail from China or Hong Kong Post Office. If want send by DHL UPS EMS or other Express shipping please contact me to change the shipping cost. We will send the item as " GIFT " It takes about 15-40 working days to arrive. Sometimes take a little longer , Due to Local dispatch or other reasons, It might goes more than 20 days . Payment We accept PayPal only. All major credit cards are accepted through our secure payment processor PayPal. Payment must be received within 10 days of auction closing. Refunds Returns If you do not satisfied with your purchase, or if it is damaged when receive, please let us know, we will do our best to help. If the problem cannot be solved, please return it to me in the condition it was received within 7 days. we will send you replacement or give you a refund. All returns should include all original items undamaged, in re-saleable condition, all original packaging including manuals, warranty forms. Buyers is responsible for the returning shipping cost. We care about our valued customers, and will always try to help you. So if you have any problems, please message us immediately. Please give us the opportunity to resolve any problem. We understand the concerns and frustrations you might have, and will try our best to resolve the issues.Please contact us BEFORE leaving any negative or neutral feedback or open any dispute on paypal.