... C. It uses silicone nipple patented safety lock, prevents baby from separating of unit, can be boiled for sterilization, ... and memory functions. Accuracy +/-0.1 C. FS-5500 Electric Digital Thermometer, Standard Size,300 pcs/carton. FS-5502 ... ,300pcs/carton. FS-5503 Electric Digital Thermometer, Accuracy Size,300pcs/carton. FS-5504 Electric Digital Thermometer, Baby Nipple Digital Thermometer,144 pcs ...