Features ADJUSTABLE SPEED: Cordless electric screwdriver set, no load speed 0-3600RPM, with 3 levels speed regulation, applicable to more fastening ad repair situations. 3 DISPLAY MODES: The cordless screwdriver has 3 electric display modes, which can track the power status at any time, with automatic reverse stop function. DOUBLE BEARING: The output shaft of the electric screwdriver adopts double bearing mode to ensure high concentricity and accuracy, which is stable and reliable. APPLICABLE BATTERY: The screwdriver is suitable for 18V lithium ion batteries, such as for BL1815 BL1820 BL1530 BL1840 BL1850 BL1860, with good compatibility. WORKING RANGE: The fastening capacity is 4-14mm, the power drill tool set is widely used for industrial machinery repair, electrical equipment maintenance, etc. Specification:Item Type: Cordless Screwdriver Fastening Capacity: Approx. 4-14mm / 0.16-0.55in No Load Speed: 0-3600r/min Number of Impact Per Minute: 0-3800/min Applicable Battery: 18V lithium ion battery (for BL1815 BL1820 BL1530 BL1840 BL1850 BL1860 and other batteries) (not included) Compatible Battery: For B series 18V lithium battery, such as  for BL1850B (197285-8), BL1840B (197270-1), BL1830B (197602-2), BL1430B (197618-7), BL1820B (197487-6) For BL1850, BL1840, BL1440 (196391-6), BL1415 (194560-3), BL1815N (196781-3) Package List:1 x Cordless Screwdriver 1 x User Manual Note:1. Not suitable for G series batteries, such as BL1813G (196663‑9), BL1413G (196882‑7), BL1415G, BL1430G, BL1815G, etc.2. Not suitable for 18V NiCD batteries, such as 1822 (194465‑7).3. Battery not included. 4. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List 1 x Cordless Screwdriver 1 x User Manual