Otoscope Penlight Clinic Medical Diagnostic Kit for Ear Nose Throat Convenient and practical ; Specially for professional ENT doctors Free-focused high intensity bulb ; Can be used for ear nose and throat Penlight can can be detached for separate use ; Specula diameter: 15mm Pen style light otoscope size: 151 (length) x 16 (diameter) mm ; Power: 2 x AA batteries (Not included) Press the push button switch to switch on and off