Specifications cheap laser projection keyboard magic cube wireless virtual laser keyboard

1,bluetooth

2,power bank 7800mah

3,for android IOS

cheap laser projection keyboard magic cube wireless virtual laser keyboard ? ? ? ? ? ? ?? ?

Specification:
Pattern Projector
Keyboard light source:	Red laser diode
Keyboard layout:	Approx.19mm sized QWERTY layout
Projection size:	Approx.?100mm(H)*240mm(W)
Projected Keyboard location:	Approx.100mm from keyboard device
Required projection surface	Non-reflective,opaque flat surface
Electrical Characteristics
Recognition rate	Over 350 characters per minute
Operation Surface	Any opaque flat surface
physical Dimension:	93mmx22mmx80mm?
?Weight:	Approx. 200g
Keyboard language:	English
Charger:	Rating 2A @ 5V
Battery?capacity:?	Polymer rechargeable battery,780mAH(Max)@3.7V
Battery working time	30 hours
Battery charging time	4 hours
Keystroke Sound:	Built in buzzer(Mute on/off the sound)
Visibility:	Good contrast up to 1800 lux ambient illumination
Effective key stroke:	?Approx. 2mm
USB interface	USB 1.1 and 2.0.USB,HID Ver.1.0
Bluetooth	v2.0(class2),HID Profile Ver.1.0
Frequency Range	2402-2480MHz
Channel	79
Modulation	GFSK
Environmental Conditions
Working Temperature	Approx.-10~40°C/90%RH
Storage Temperature	Approx.-20~40°C/~90%RH

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