This is the Mamba Micro X2 2850kV Waterproof Sensored ESC by Castle Creations

Key Features

Waterproof design
Additional settings and software updates available via Windows based Castle Link software and USB adapter or the Castle Link App for Android or iOS and a B-LINK bluetooth adapter
Convenient transmitter programming for six common adjustable settings
Telemetry ready
Auxiliary wire functionality allows for "on the fly" adjustments such as max power and max brake
Audible alerts that will notify you of possible issues with calibrations and error conditions

ESC Specs

Input Voltage Range: 2S-4S LiPo (16.8V Max)
BEC Specifications: No internal BEC in ESC. External 10-amp CC BEC included.
Operating Environment: Waterproof* design allows for use in nearly any environment; included CC BEC is not waterproof.
Brake: Proportional
Reversible: Yes, but may be disabled
On/Off Switch: Yes, waterproof
Size: 41.6 mm x 29.4 mm x 21.3 mm
Weight (with wires): 1.66 oz / 47 grams
Connectors: 4.0 mm bullets

Motor Specs

Input Voltage Range: 2S-4S LiPo
Kv: 2280
Max. RPM: 100,000
Size: Length: 49.5mm
Diameter: 36mm
Weight (w/wires): 197 g / 6.9oz
Shaft Size: Length: 15mm
Diameter: 1/8" (3.17mm)
Mounting Hole Specifications: M3 @ 25mm

Includes

1 x Mamba Micro X2 ESC with 4 mm Connectors
1 x 1406-2850Kv Sensored Motor
1 x Sensor harness
1 x Drivers Ed and quick start guide
1 x Castle decals

Save on Shipping

• Mark Twain Hobby Center offers a range of shipping options that will fit your needs. Please review the shipping choices to see which one works best for you and select it in the shopping cart or at checkout. 
• Mark Twain Hobby Center offers faster discounted shipping methods on most items to help you get what order faster based on your needs. Shipping can be changed in your shopping cart when you are checking out.
• Most packages with free shipping arrive within 4 to 8 business days depending on how they move through the shipping stream, but may take longer during peak shipping seasons and other delays in transit. If you are needing your orders faster, please choose a faster shipping service that is offered.
• All orders placed by 2 pm CST are shipped same day with tracking.

Feedback

• At Mark Twain Hobby Center, we work extremely hard to ensure that your order is shipped and arrives quickly to you. If an error is made or the order is not up to your satisfaction, please reach out to us before leaving feedback so we can work to correct for you. We are here Monday - Friday to help you!

Returns

• We want you to be satisfied with your order and offer free returns for orders placed within 30 days. Please start a return if you need to return a new and unopened item back to us. Ship the order in a box or envelope to prevent damage in transit back to us. Any item that is shipped back unsecured will not be refunded or a restocking fee will be assessed.
• All returns must be in new and unopened condition to be returned back to us. We do not accept back used or opened items for a refund. If an item is returned as new and arrives opened or used, the order will not be refunded or a restocking fee will be assessed. Please reach out if you are not sure if your order can be returned.
• If you receive an item that was shipped incorrectly to you, please contact us so that we can fix for you. In most cases, we will be able to ship the correct item with a return label for the incorrect item to be returned to us at no cost to you. 
• If your order is damaged in shipping, please contact us immediately so that we can start a claim. Do not open or use the item as that will void the claim and the order will not be able to be returned.
• Defective merchandise is handled per the manufacturers defective item policy. Please refer to the manufacturers defective merchandise policy, or reach out to us and we will provide it for you.

International Buyers

Import duties, taxes, and charges are NOT INCLUDED in the item price or shipping charges. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up, do not confuse them for additional shipping charges. We do not mark merchandise values below value or mark items as "gifts", US and International government regulations prohibit such behavior.
We only accept PayPal as payment from International buyers.

International Average Delivery Times
First Class Mail: 2 to 4 Weeks
Priority Mail: 6 to 10 Business Days
Express Mail: 4 to 8 Business Days

These times are estimates only and can be delayed by customs.

NOTE: International First Class Mail is an economic way to ship all over the world, but is not very timely. The average delivery time for International First Class Mail is 2 to 4 weeks depending on how the package moves through customs and the postal system, but can take up to 45 days to arrive. If you need it faster, please choose International Express Mail or Priority Mail that has a average delivery time of 6 to 10 business days.