The TC-E2 is a 2x teleconverter for Nikon Coolpix cameras. It screws securely into the 28mm filter thread (why do high end point and shoots no longer have these?), considerably increasing the size and weight of the camera. The converter itself has a 62mm filter thread.
Construction standards are impeccable: an all-metal barrel and four lens elements. It gives a maximum focal length of 230mm with a Coolpix, with a respectable f4 aperture. As the nature of small-sensor cameras is to perform best wide open, this is quite useful.
Image sharpness using the teleconverter is quite respectable, though I found a tendency to get camera shake as it is harder to hold a relatively heavy point and shoot still at arm's length than it is to hold a DSLR pressed against your face. Reckon on using a shutter speed of at least 1/300. Chromatic aberration is not a problem, though you will probably find some if you look closely enough.
This product certainly delivers as promised, but I find that I seldom use it: the wide-angle converter is useful on more occasions, and 230mm is still too short for many telephoto uses. There is a 3x converter, which may however be difficult to use without a viewfinder.
The teleconverter is supplied with front and rear lens caps and a velvet carrying bag. It seems durable enough to use as a weapon, and the black surface is unmarked after years of (occasional) use. The main drawback is price. At £130+, it may well be a better bet to invest in a new camera with a longer telephoto reach.