Built-in Bluetooth module. Built-in green laser module. Built-in automatic shutter and linkage shutter module. The body comes with a one click start button for the Northern Hemisphere star speed. All power banks with 5V output can be used as power supply devices, and the mobile software controls tracking speed, shutter button, and exposure time. (Note: Currently only supports for Android software control. For iOS users can switch tracking speed with infrared remote control) The software can achieve:- Scheduled shutdown. - Custom speed. - Northern and Southern Hemisphere tracking. - Tracking of stellar velocity, solar velocity, and lunar velocity. - Jogging the tracking of the northern and southern hemispheres, accelerating and decelerating. After connecting the camera with a 2.5mm shutter cable, the following can be achieved: - Automatic timed shutter (P, A, M) - Camera and equatorial mount linked shutter (P, A, M) The duration of stable tracking of a single long exposure lens measured for each focal length lens in the case of coarse polar axis is as follows: - 14mm lens: 24 minutes - 20mm lens: 17 minutes - 24mm lens: 14 minutes - 35mm lens: 10 minutes - 50mm lens: 07 minutes - 85mm lens: 04 minutes - 135mm lens: 2 minutes 30 seconds - 200mm lens: 1 minute 40 seconds - 300mm lens: 1 minute The color of the screw wrench cable is random, no specified color is accepted Color: Black Material: Aluminum Alloy+Stainless Steel Package Contents: 1 x Equatorial Moun 1 x L-shaped Quick Mount Plate 1 x Type-C Power Cable 1 x Hex Wrench 1 x Open-ended Wrench 1 x 1/4 to 3/8 Conversion Screw 1 x Storage Bag