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! Note:the YB-500B(LED) with YB-500B(LED)-VEM both size are same. YB-500B(LED)-VEM have the door status with lock status output,YB-500B(LED) only have the door status ouput,they are only little different. YB-500B(LED)-VEM is an all-metal construction electric bolt .with 1000kg holding force. The bolt is made of 304 stainless steel solid bar by CNC lathe and with anti-burglar design to meet the standard of special security requirements. The security type of this Bolt is Unlocked when energized.It can be worked in the temperature of 60 ? or -40 ? below zero based on the all-metal linkage parts. With the multiple designs of durable magnetic valve, special photoelectric control system, ultra-low temperature and power consumption design, anti-prizing and smart circuit. Photoelectricity Controling,no machanical defect. Low Temperature, safe Durable. Low Power, Environmental Protection. Long Life with 500000 cycles. MOV Provides Reverse Current Protection. Special photoelectricity control,three steps current application. The humanized design of Led helps to indicate the working status of lock. The applying of kirsite and Stainless Steel prevent the lock from high temperature,corrosion or damage. With complete accessories,available for any doors. 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 Secure(Unlocked when energized) Face Plate 192Lx25WX37H(mm) Strike 90Lx25Wx3H(mm) Bolt 16mmDIA,stainless steel 13mm throw Voltage 12VDC Start Current 1000mA Standby Current 150mA(+/-20%) Feature Fail secure Autolock Time Delay 0,3,6,9sec Solid Bolt Holding Force 1000Kg Lock cylinder material Stainless Steel Face place material kirsite Led With Led Indicate Suitable For Wooden Door,Glass Door,Metal Door,PVC Door Door statue signal output contact Door Status:NO/COM. Lock Status:NC/COM Surface Temp Low Temperature Induction Distance 10mm LED Light on indicates locked, light off indicates unlocked Special Designed Tested to 500000 operations Face place material 304 stainless steel, wire draw finishing Weight 0.68kg Patent No. 201420531846.3 Package included: YLI YB-500B(LED)-VEM Fail Secure Lock 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.