Features: 1) Power to lock 2) No mechanical damage 3) Voltage: normally use 12V DC 4) For doors open 5) Applicable for all types of door fire exit paths 6) No frame door can choose bracket (model: PZMC270U) 7) Weight: 1.8kg 8) Dimensions: 253 x 25 x 48mm 9) Working current: 500 / 250mA 10) Holding force: 270kg