Since your mixer grinder runs on a powerful motor, there will be some noise. If the noise level seems abnormal, please contact Brand Service Centre The True 5 Jar Mixer ; 3 Speed Setting ; Power Features: AC 230 V/50 Hz ; Additional Features: Unique Inter Locking System Warranty: 2 Year warranty on products and 5 years on Motor Double safety locking system, The base of a mixer has a lock that will protect the mixer from starting when jar is not fit into the groove properly. The second lock present on the lid also protects the mixers by not starting the motor if lid lock is not in place, this gives you double safety Convenient Piano Type Button Switches Child Lock Safety