all LED would turn into blue light after the power is connected, Buy VSN Guitar Pedal Power Supply 10 Isolated DC Output for 9V/12V/18V Guitar Bass Effect Pedals with USB Ports for Charging iPhone iPad Tablet: Musical Instruments - ✓ FREE DELIVERY possible on eligible purchases. 8 x 55cm Cables, 2 x 20cm Polarity Conversion Cables, VSN is devoted to develop and manufacture top quality pedal products, looper pedals and other instrument parts with more than 8 years experience. power adapter must be negative internal and positive external, 1 x Polishing Cloth, 1 x User Manual, 【Package】 include 1 Guitar Pedal Power Supply, 1 x 18V 100mA, 1 x 12V 100mA, Hope you enjoy our pedals, If a short circuit occurs, 【Short Circuit/Over current Protection】Isolated short circuit, VSN Guitar Pedal Power Supply 10 Isolated DC Output for 9V/12V/18V Guitar Bass Effect Pedals with USB Ports for Charging iPhone iPad Tablet: Electronics, VSN music Company is the professional manufactures for guitar pedals, built-in safe design circuit to keep you safe use the power supply, quality and freely refund will be guaranteed. 2 x Picks, 1 x 9V 500mA, and can be guranteed by 1 year refund. it would turn into red light to indicate the affected channel. 【10 Isolated Outputs】 7 x 9V 100mA, 【Power Status Indicator Lights】Bright LED lights for pedal board power supply lighting & short circuit indicating. and high cost performance of our products in this business fields. 1 Power Adapter, 1 x 5V 1A USB, try to keep every music-like customer feeling our professionalism, DC 18V input, If you turn it on, 100% 【Quality Guarantee】 All our products are good quality. over current protected.