Size details: Designed for built-in. Front size of electric fireplace :35.63”(w) x 27.5”(H) x 8.84”(D). Back size of electric fireplace:32.23”(w) x 26.22”(H) x 7.7”(D). Minimum opening wall size:32.7-35.2”(w) x 26.4-27.1”(H) x 8.5-8.7”(D) Features of electric fireplace insert: 3 Flame colors(yellow-blue-purple), 3 top light color(yellow-blue-purple). Flame and lights can be shown without heating Open glass Door and movable Mesh Screen: For the realistic traditional wood fireplace, Glass door can be open and close. The movable mesh can be moved Log speaker: make the real log burning effect Two Heating Modes: Heating for 400 sq.ft, Low temperature(750W) and High temperature(1500W) of electric fireplace insert are optional. Choosing low temperature at the beginning and high temperature after 30 minutes can make the space temperature rise more quickly and evenly. Due to the overheat protection device, it is recommended not to choose the high temperature initially. The heating can be work without flame Security protection : 1-9 hours timer for working and overheating protection. The recessed electric fireplace insert will be shut-off when overheating This built-in electric fireplace insert fits wall openings 32.7-35.2”W × 26.4-27.1”H × 8.5-8.7”D. It features 3 flame and 3 top light colors (yellow/blue/purple), with open glass door and movable mesh for realism. Log speaker delivers authentic fire crackling sounds. Dual heating modes (750W/1500W) cover up to 400 sq.ft; flame and lights work independently of heat. Equipped with 1-9 hour timer and overheating shutoff for safe daily use.