This 600-watt low voltage landscape lighting transformer features clamp-type terminal blocks that offer many advantages over typical screw-type blocks. With no tools required, stripped wires are inserted individually into each hole, then clamped in place. The process is fast, simple and provides extremely secure connections. Designed for LEDs, so only two voltage taps are required: 12V for short runs, and 15V for longer runs or runs with more fixtures. VOLT Timer & Photocell Combo included. Dimensions: 15.81" height x 8.25" width x 7.16" depth