Features : 1. CMOS integrated circuit and LED digitaldisplay. 2. The special probe counts sensitively and accurately. 3. It is composed by counter, probe and count pond,etc. 4. The magnificationisvariable by adjusting theflectional arm Model BC-50A BC-50 Phonetic Counting Yes No Amplification 5X, 10X Counter Range 0 ~ 999 Suitable Petri Dishes Φ50mm, Φ90mm Character Height 13mm Lamp… Selengkapnya »