Check the listing for details. New Equatorial Mount Single Axis Solid Motor Drive Corrector Heel for Telescope. Condition: New. Listed at 80.45 USD. This motor drive allows tracking of celestial objects at the speed of the earth's rotation rate. The hand controller can be used as a correction for long exposure photographs. For the motor drive to properly compensate for the earth's rotation, your telescope mount must be polar-aligned and the altitude axis set to your local latitude. Under these conditions, no adjustment of the declination axis should be necessary for astrophotography. You will only need the R.A. motor drive. When the power is on and all buttons on the control box are depressed, the motor drive will automatically rotate at the correct speed to compensate for the rotation of the earth. Its rotation speed matches the earth's rotation rate for stars to appear stationary in telescope eyepiece. Noted: Battery not includeTerms of Sale 1. If there are any problems with our products,Please feel free to contact us.We will always here to solve them for you.You don't need to contact ebay or paypal.And please DO NOT leave us Neutral/negative feedback,It won't help the problem to be solved.And it is the worst hurt to a seller.We should try our best to make a happy easy transaction. 2. If you are satisfied with our products and our service,please tell your friend and leave us positive feedback;if you are not satisfied with our products or service,please DO tell us. 3. After receiving the item,you could contact us within 30 days.Refund will be given as money back or item exchange.ReturnAll returns must be made within 30 days after delivery date. Any return must include all original items undamaged, in re-salable condition, and includes all original packaging including manuals, warranty forms, etc. Shipping and handling fees are not refundable. Buyer is responsible for shipping costs incurred shipping products back.Questions, Comments or Concerns: Please e-mail if you have any questions or comments and we will respond as soon as possible.Contact us 1. Working Day: Monday to Saturday 2. Working Time: 9:00 am to 19:00 pm (GTM +8:00 Beijing) All emails will be answered within 1 business day( Except Holidays or weekends ). If you do not receive our reply, please kindly re-sent your email and we will reply to you as soon as possible.Thanks We are not responsible for any custom duty or import tax. We will leave POSITIVE FEEDBACK after receiving the positive feedback. Please contact us first before giving a non positive feedback. Thank you for giving us a chance to make things right by good communication. Once you purchase, please DON'T leave negative or neutral feedback.