photo cell,is made of one control mode and two eyes,act ... of automatic door ,to supervise the door of operation . photo cell,General international optical lens design, and good focus, controlled reasonable ... , the power of a shot long life. A single-or dual-group lens group transceiver connecting points of entry, and good ... )×13mm(D)control:123mm(L) × 50mm(W) × 32mm(H) photo cell