is the acceleration range selectable

Hi Yes,it is selectable,it is 2g 4g 8g 16g.it can be set.

Is the accelerometer easy to mount for experiments on ballscrew nuts?

Hi,Sir. You can make the test by yourself. Sincerely.

Hi just bought one for simple headtracking and it came with no info at all - ie is there a battery in it in uk? Is there a switch - any info online?

1.Yes, it has been built-in the battery for whole Europe-placemarket. 2.Yes, it has the switch on beside. 3.Yes. Help If you need User manual, PC software, APP(Android), sample code and AD package, Please enter our official service website:https://wiki.wit-motion.com/english/doku.php?id=bluetooth_inclinometer Detailed videos, please search “witmotion”on YouTube And you can download anything you need by yourself. Contact Us Website: www.wit-motion.com/english.php Skype: (+86)13005457470 javin@wit-motion。COM WhatsApp: (+86)13005457470 King regards Javin From Witmotion

What app do I download on the Apple store?

Hello Sir. Nice to hear from you. Here is Javin who service you as your consults. I am sorry that the BWT901CL does not support connection via IOS App. And you can download the Android App via our link as below: Help If you need User manual, PC software, APP(Android), Sample Code,Drive and AD package , Please enter our official service website: https://wiki.wit-motion.com/english/doku.php?id=bluetooth_inclinometer Detailed videos, please search “witmotion”on YouTube Please click the relevant type :BWT901CL: which respond to yours,you can find the User Manual & PC software & Android APP & Sample Code & AD Package & Drive by yourself. Note: Please make sure that the config on the PC software as below: 1.Serial port 2.Baud rate: 115200 3.Type : Normal About the video reference with the usage of BWT901CL,you can have a view about the link as below: https://www.youtube.com/channel/UCxBLgvYQNk-sGVDp42ch-Ug And please make the calibration ( acceleration and magnetic field) as the video firstly before the usage of product. 3:About consult or issue: You can contact me freely if you have any other consult/question/custom design/bulk order. You can add my Skype and WhatsApp maybe it will be convenient for our conversation. And I will reply to you as quickly as possible. I am looking forward to serving you again in near future. Note:you can contact with me by email just replace" ." with" 。" for the convenience. 4.Feedback: Your positive comment means the world to us. Your support is hugely appreciated! Sincerely. Contact Us Website: www.wit-motion.com/english.php Skype & WhatsApp & WeChat: (+86)13005457470 javin@wit-motion。COM King regards Javin From Witmotion

Manufacturer	WitMotion
Part number	BWT901CL
Item Weight	0.97 g
Package Dimensions	9.5 x 8.6 x 2.9 cm; 0.97 g
Item model number	BWT901CL
Size	36 * 51 * 15 mm
Style	Rugged
Material	Polycarbonate
Measurement Accuracy	0.05 Degree
Plug profile	Surface Mount
Batteries included?	No
Batteries Required?	No

[Bluetooth Accelerometer+Inclinometer] BWT901CL MPU9250 High-Precision 9-axis Gyroscope+Angle(XY 0.05° Accuracy)+Magnetometer with Kalman Filter, 200Hz High-Stability 3-axis IMU Sensor

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