Techalogic DC-1 When set up you just press a button and it merrily records for about 2.5 Hours. If you buy directly from Techalogic then enter code PWAS1 and you you wil get a 7% discount!
I've seen some people have issues with Techalogic and they have bought 2 from Chilli so one does front and one does back. - they get shoulder vest and wear one on each shoulder.
I have a Techalogic but struggled with getting it to connect to phone so could check the positioning. I had 3 rides where I gave up as it only recorded for about 10 minutes and then turned off.
I got a Chilli and although I found it easier, having to unscrew the back so can connect to phone so can check the positioning irritated me.
(I ride in woods and I need it pointing down quite a bit plus a wonky horizon irritates me so I may be more pernickety than others).