Portable Pen Mouse:
2.4G USB Portable Handheld Wireless Optical Trackball Pen Mouse Laptop PC Adjustable DPI Digital Pen Mouse with OTG USB Adapter

Features:
2.4G Wireless optical pen mouse, ultra-portable: 5.7 x 0.6 x 1 inches mini size, just like a pen. the transmission distance can be up to 33 feet. Plug and play: means your needn't install any software!
High responsiveness: 800, 1200, 1600 DPI levels adjustment-500/1000, provides more sensitive than standard optical mice for smooth and precise tracking on a wide of range surface.
Power Saving - Wireless 2.4G touch screen pen mouse, come with USB receiver, Battery: 1 x AAA battery (not included). Up to 33ft effective distance.The auto sleeps function, no worry about waste of your battery.Compatible with: Windows ME/ NT/2000/XP/Vista/Windows10, 7/Android/Linux/MacOS.
It fits in your pocket, take it to your class, working PPT speech and other occasions and wherever you go. You can use a wireless mouse anywhere you like.
with the two parts of usb otg adapter ,you can also use the mouse pen to fit with different kinds of tablet that with only type C port or micro usb port , even the cellphone that with type C port or micro usb port.

Specification:
Product Size: 140 * 20 * 15mm,
Product weight: 29g
The number of button: Three button + scroll wheel
Wireless carrier frequency: 2402 MHz - 2480 MHz /24GHz-24.8GHz
Wireless working channel: 16, automatic frequency hopping,
Rated working voltage: 3V,
Rated working current: 15 mA,
Tracing system: optical
Speed: 14 inches / second
Transmission Distance: 33 feet
Power Supply: 1* AAA battery( NOT included)
3-resolution adjustable : 800/1200/1600dpi
Supports system: Windows98/ XP/ vista/ Windows7/ Tablet PC/ Mac OS X/ Linux
Operation :Plug and play, no extra driver needed
Color : Red

Package Included:
1 * Wireless Pen Mouse Red
1 * USB 2.4GHz Receiver
1 * Mount
1 * OTG: Micro + Type-C Adapter
1 * User Manual

Finger Ring Mouse:
High Speed Mini 2.4GHz USB Wireless Lazy Finger Rings Optical Mouse 1600Dpi for PC Laptop Desktop

Features:
100% new high quality USB finger optical mouse.
Plug-and-Play, no installation needed.Can be used on any surfaces. No mouse pad is required.
Ergonomical design - reduce fatigue effectively.
Mini Cute Wireless Finger Rings Optical Mouse 1600 Dpi.
no include AAA battery.
Compact and lightweight, easy to carry and convenient to use
Suitable for notebook, laptop, tablet, desktop PC

Specification:
Material: ABS
Color: Black
Size: 60*30*30mm
Power Supply: 1* AAA battery NOT included)
Interface: USB
Wireless Frequency: 2.4GHz
Working Distance: 10 meters
Buttons: 4 buttons
Resolution: 1600 DPI
System Compatibility: Windows2000 /XP /Me /98 /Win7 /Win8/Win10/ Mac/ Android

Package Included:
1 * Finger Ring Wireless Mouse
1 * USB Receiver