300A In-Line CIRCUIT BREAKER FOR 12-48V DC CAR A/V SYSTEM ·For car audio/video system overlord protection·No fuse change trouble& headache·Easy to operate with manual reset arm ·Self-Testing & Manual Override·Can be mounted on panel or firewall·Water Protection design·Input:12-48 Volt 300 Amp·Size: L 4 1/4" X W 1 5/8" X H 1 1/2 " Other amps available: 50A,60A,80A,100A,140A,150A,200A,250A About Payment:We accept Paypal only. About shipping:We send the goods in 1 working day after received your payment.Monday to Friday.(Beijing Time)We ship worldwide,if your country is not in the list,pls contact us freely.We are happy to help you.Normally it takes 7-15 working days for E-packet shipping to US.Some items we ship from US by USPS and it takes 2-5 working days to reach your hand.It takes 30-40 working days for Ecomonic Int'l Shipping to worldwide.For Working days,the weekends are excluded.Pls be enough patient with the shipping time!If you can not wait,you can ask for sending by DHL/FEDEX/UPS,etc,just pay a little more freight. About return:Some times the product may be damaged in transportation or we sent the wrong items to you.Pls send us pictures and you will get refund.Pls don’t leave negative/neutral feedback without contacting us.There will be many ways to solve any problems. Enjoy the shopping in our store!