Raspberry Pi Wireless Keyboard 1

• 92 keys, 2.4Ghze wireless Keyboard with Touchpad.
• Touchpad DPI adjustable functions.
• Built-in high sensitive smart touchpad with 360-degree flip design.
• Mini QWERTY keyboard with multimedia control keys and PC gaming control keys. Auto sleep and auto wake mode.
• The Ergonomically handheld design is easy to carry and operate.
• Build-in removable rechargeable Li-ion battery that has longer standby time.
• Note:It will go to sleep mode, if no  operating after 3 minutes. You can press any key to go on.

Specification:

• Operating range: 15 meters(MAX), without signal disturbance and no direction limit.
• Frequency range: 2.403GHZ ~ 2.480GHZ
• Operational voltage: 3.3V
• Charge Voltage: 4.4V ~ 5.25V
• Channel: 78 channels
• TX Power: less than +5dBm
• Transmission rate: 1M bitc
• Frequency tolerance: +/-30ppm
• Power consumption: 55mA(on), 1mA(sleep)
• Battery Type: Built-in lithium-ion battery