Silicone Heated Bed 200 * 200 mm 12V/24V. These boards are all fully tested to confirm even heat distribution and correct resistance note: before touching, power off the heat bed and wait at least 10 minutes; still hot after powered off; do not leave unattended; keep away from children as the nature of the pcb material, flatness can’t be defined and you will need an aluminium or glass top plate 12v connection: one cable connected to terminal 1(+ve), another cable connected to terminal 2 and 3 (-ve). Default connection provided with product for 12v power supply. At this time the resistance value of the two lines is 1. 0 ~ 1. 2ÃŽ, The actual power is 144w. Note: please do not consider soldered wire color for connection (sometimes it may interchange), please refer power connection information printed in tabular form on heat plate. 24V connection: one cable connected to terminal 2 (+ve), another cable connected to terminal 3 (terminal1 unconnected), the resistance value of the two lines is 4. 0ÃŽ, Actual power is 24 * 24/4 = 144w. The new version of the circuit, whether connected 12vor 24v, the power will stable at 144w. Note: default connection provided for 12v supply. For 24v supply please desolder the connection and connect it as described above. Please refer power connection information printed in tabular form on heat plate. 3Dinnovations storefront link.