170° |} The HD HERO also offered an expansion port on the camera's rear panel, branded the HERO Bus. Optional accessories included the LCD Bakpac, which offered a small monitor that displayed and played back video, and the Battery Bakpac, which doubled the battery life of the camera. HD HERO 960 HD HERO 960 was a reduced-cost version of the HD HERO that shoots at a maximum video resolution of 960p30 and is not compatible with the electronic accessories for the HD HERO because it lacks the proprietary HERO Bus expansion port, although the camera is compatible with all GoPro mounts. It was first listed on August 6, 2010. HD HERO2 The HD HERO2 was launched on October 24, 2011. It has a 1/2.3" 11 MP image sensor, improved low-light capability and records at up to 120 fps. It was sold with three different accessory packages as the Outdoor, Motorsports, and Surf Editions. HERO3 (White/Silver/Black) In late 2012, GoPro announced the HERO3 line of cameras. These cameras came in three editions: black, silver and white, denoting the relative capabilities of each camera, in descending order. Externally, the model is distinguished by the ink used to print the number "3" on the front of the camera. All three versions of the HERO3 come in a 30% smaller and 25% lighter package, with WiFi built in. The change of the physical dimensions of the cameras compared to the previous generations (HD HERO and HD HERO2 were physically identical) means that some accessories for HD HERO Original and HERO2 are not compatible with HERO3, so GoPro made new versions of those accessories specifically for HERO3, which mostly also were compatible with HERO3+, see below. Those new versions of accessories are usually not compatible with older Hero camera generations. However, a lot of other accessories are compatible with all HD Hero camera generations. The HERO3 Silver and Black cameras have significantly less battery endurance than the HD HERO Original and HERO2. For example, in 720p resolution with 25/30 fps, while HD HERO Original and HERO2 have a stated battery runtime of 3 hours, HERO3 Silver Edition has a stated battery runtime of 2 hours, and HERO3 Black Edition has a stated battery runtime of 1.5 hours (the Black Edition's "most economical" setting is 1080p/30 fps, so this also partially contributes to its poor battery runtime). The Black Edition has a new 12 MP sensor,