That little bar end mirror is probably okay. I'd have a hard time with it being so down low and close to my hand. You can do better.
Here's where I buy mine from, www.bikeworldusa.com
They have quite a few to choose from. Mostly better prices than that also.
They have one particular mirror that's meant for scooters. A basic round, maybe 33 inch, mirror on a long rod with a good handlebar mount. I'm happy with it. But I've been happy enough with a few others that they have to offer.