Bought the Tapplock One+ thinking. The worst product I have ever used and i regretted it big time. I bought the lock for barely 4 months and it is spoilt. the lock just freezes and when i finally managed to unlock it, it does not go into hibernation mode when not in used. it just drains the battery dry within a day. Forget about what the ad. says about it being weatherproof or waterproof. they are totally untrue. The customer service wrote to me saying that they are unable to do anything about my lock as i bought it from Singapore Changi Airport (who is not an authorized agent) they do not even attempt to provide any possible solution. poor customer service and bad product. Purchase it at your own risk!