400 Points Breadboard Specification Size: 3.2 x 2.1 x 0.3 inch/ 82 x 55 x 9 mm 300 Tie-point ic-circuit area Plus 2x50 tie-point distribution strips providing 4 power rails. 830 Points Breadboard Specification Size: 6.5 x 2.1 x 0.3 inch/ 165 x 55 x 8.5 mm 630 tie-point ic-circuit area plus 2x100 tie-point distribution strips providing 4 power rails. Power Supply Module Specification Size:53mm x 35mm Apply to MB102 breadboardcompatible with 5 V, 3.3 V Input voltage: 6.5-12 V (DC) or USB power supply Output voltage: 3.3V/5V can switch over Maximum output current: <700 ma Fluctuation two road independent control, can switch over to 0 V, 3.3 V, 5 V On-board two groups of 3.3V, 5V DC output plug pin, convenient external lead use Jumper Wires Specification Voltage / Current: 300V/3-5A Color: 7 assorted colored Material: High-grade copper core Cable Length: 12cm/16cm/20cm/25cm (4.72in/6.30in/7.87in/9.84in) Battery Clip Specification Male DC Plug2.1mm X 5.5mm Application: 9V batteries and 9V snap battery holders Packing List 400 Points Breadboard1 Pcs 830 Points Breadboard1 Pcs Power Supply Module1 Pcs Battery Clip1 Pcs Jumper Wires65 Pcs - Input voltage: 6.5-12 V (DC) or USB power supply; Output voltage: 3.3V/5V can switch over - Maximum output current: <700 ma - Breadboard Material: ABS Plastic Panel, Tin Plated Phosphor Bronze Contact Sheet - Jumper Wires length: 12cm/16cm/20cm/25cm (4.72in/6.30in/7.87in/9.84in) - Application: Can be used for various DIY projects