Built-in Bluetooth module.Built-in green laser module.Built-in automatic shutter and linkage shutter module.The body comes with a one click button for the Northern Hemisphere star speed.All power 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 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 length lens in the case of coarse 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 - 200mm lens: 1 minute 40 seconds- 300mm lens: 1 minuteThe color of the screw wrench cable is random, no specified color is acceptedColor: BlackMaterial: Aluminum Stainless SteelPackage Contents:1 x Equatorial Moun1 x L-shaped Quick Mount Plate1 x Type-C Power Cable1 x Hex Wrench1 x Open-ended Wrench1 x 1/4 to 3/8 Conversion Screw1 x Storage BagOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.