model：M1
Keyboard layout：QWERTY layout (approximately 20 mm spacing)
light source：Red laser
Projection size：Width: 250mm, height: 100mm
Working platform：Non reflective, opaque plane
External power supply：USB power supply / more than 5V 2A
Battery and capacity：Lithium ion battery, 2500mah (max) @ 3.7V
Battery working time：About 500 minutes
Battery charging time：About 180 minutes
portable source：USB output 5V 1A
Bluetooth：V3.0, HID PROFILE VER 1.0
frequency range ：2402 2480MHZ
passageway: Seventy-nine
modulation mode: GFSK
Dimension (mm): 90MM X 44MM X48MM
Weight (g): About 125g
