Bullet_point: ['Available with integral battery compartment designed to accept 2 or 4 AA, 1 9V, or 1 9V and 2 AA batteries', 'External measures 6-11/16" length by 4-13/32" width by 1-3/8" height; internal measures 6-15/32" length by 4-11/64" width 1-11/64" height', 'Internal PCB mounting bosses and a recessed top surface suitable for keypad or label', 'Made out of ABS plastic in a black finish with UL94V-O flammability rating', "Style N is an ergonomically designed blend of 'T' and rectangular shaped enclosures with ribbed and rounded sides which provide a comfortable and secure grasp"] (Page 1)