@murrayjames

电枪(stun gun)、电棍(electronic stick?) and 泰瑟枪(taser). They could be the same thing but there's a slight difference among them:shape-wise.

Here's a link for three of them(Those three pictures on the right)

http://www.baidu.com/s?wd=电枪&rsv_spt=1&issp=1&rsv_bp=0&ie=utf-8&tn=baiduhome_pg&rsv_sug3=6&rsv_sug=0&rsv_sug1=3&rsv_sug4=561