FIRSTBLOOD B21 Wireless Bluetooth/USB
Mechanical Gaming Keyboard User Manual

Thank you so much for purchasing our First Blood B67 Mechanical Gaming Keyboard. This product has various cool features and lighting effects. Hope to bring you a new operating experience. Official website:

FIRSTBLOOD B21 Wireless Bluetooth USB Mechanical Gaming Keyboard Instruction Manual - Keyboard

1. FIRSTBLOOD B21 Wireless Bluetooth Technical parameters

Product brand: FIRSTBLOOD
Item model number: B67
Transmission method: wired USB +2.4G + BT three-mode
Interface type: key line separated Type-C interface
Product size: 333.1 x 124.1 x 54mm
Product weight: 1135g
Shell material: acrylic transparent
Wire length: 1.8M
Lighting effect: RGB, 18 groups
Key layout: 67 key layout
Sup port system: Windows XP/Vista/Windows 7 /8/10/11 FIRSTBLOOD B21 Wireless Bluetooth

2. Description of sleep mechanism and power display

  1. Deep sleep
    After30 minutes of no key operation on the keyboard, deep standby, Bluetooth disconnection and sleep, press any key to wake up the keyboard backlight and connect back to Bluetooth;
  2. Power saving sleep
    The backlight will be turned off after 5 minutes of no key operation on the keyboard, press any key to wake up the keyboard backlight and connect back to Bluetooth;
  3. Power display
    Press the FN + Back key combination (supports 2.4G/Bluetooth mode), the backlight turns off, and the number keys 1 too light up to display the power ratio, for example: 1 is on, it means 10% power, 1 and 2 are on, it means 20% power;
  4. Low battery display
    The FN key indicates the low-power charge indication Description: The FN key light flashes in low power mode, the FN key light is always on when charging, and the FN light returns to the default state when fully charged. (connect in any wireless mode Plug in the USB cable to charge the device)

3. Description of wired, 2.4G, Bluetooth connection

  1. When the switch is turned to the wired gear, it is the wired connection mode Wired mode, toggle the switch to the middle, USB plug and play;
  2. FIRSTBLOOD B21 Wireless Bluetooth When the switch is turned to the Bluetooth gear, the Bluetooth connection mode
    1. CD. FN+Q/W/E: Press and hold the FN+Q/W/E key combination for3S at this time, the keyboard enters the pairing state, the indicator light corresponding to Q/W/E flashes white rapidly, the Bluetooth connection is successful, and the device indicator (Q /W/E) to stop blinking.
    2. Bluetooth device switching: This product supports the control and storage of3 Bluetooth devices, through FN+Q, FN+W, FN+Q /W/E to select and call among the three successfully paired Bluetooth devices, when switching paired devices, the keyboard The legit flashes slowly and enters the reconnection state. If the switch is successful, the backlight flashes to restore the state. The reconnection time is 30s, the pairing time is 120s, and the timeout enters deep sleep.
  3. When the switch is set to 2.4G, it is 2.4G connection mode FIRSTBLOOD B21 Wireless Bluetooth
    1. 2.4G code pairing: 2.4G mode, toggle the switch to the left, the receiver can be used when plugged intertie computer. (Note: The factory keyboard and the receiver have been paired successfully. Press and hold the FN+R key combination for3 seconds, the R key light flashes to enter the code pairing, and the R key indicator light stops flashing when the code is successfully paired)
    2. 2.4G wireless connection: Insert the attached 2.4G wireless receiver into the USB port of the computer host, and then turn the side switch of the keyboard to 2.4G connection mode.

4. Operating Instructions for Lighting Mode

FN+\I Light effect switching, 18 kinds of light effects cycle in turn:
FN+T/Y/U = Three sets of game lighting effects can be customized FIRSTBLOOD B21 Wireless Bluetooth
FN+ T = Default FPS Mode – W/A/S/D/ ↑/↓/←/➔
FN+Y = Default LOL Mode-Q/W/E/R/D/G/F/B/V/L-Ctrl/L-Alt/Tab/Space/1-6/Esc
FN+U = Default37-keyoffice mode:A-226 English letters/[/]/;/’/./,/// ↑/↓/←/➔
FN+I = Record/save lilting mode for the above three game mode lighting effects, press the button once during recording to create a color, a total of 7 colors
N+ ↑ = light brightness+ {five gears) when the overall backlight is adjusted to the limit, it flashes 3times to indicate
FN+ ↓= Light brightness – (five gears), the overall backlight is turned off when it is adjusted to the limit
FN+←=dynamic light direction switch FIRSTBLOOD B21 Wireless Bluetooth
FN+➔ = toggle backlight color
FN+(= light speed – (five gears), the overall backlightflashes3 times when it is adjusted to the limit
FN+) = Light speed+ (five gears) when the overall backlight is adjusted to the limit, the overall backlight flashes3 times.
FN + Spacebar = long press for 3 seconds -5 seconds, the keyboard light flashes 3 times, restore factory settings FIRSTBLOOD B21 Wireless Bluetooth

5. Description of key compound function

FIRSTBLOOD B21 Wireless Bluetooth USB Mechanical Gaming Keyboard Instruction Manual - Description of key compound function

FCC Caution:
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. FIRSTBLOOD B21 Wireless Bluetooth

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: FIRSTBLOOD B21 Wireless Bluetooth
— Reorient or relocate the receiving antenna.
— Increase the separation between the equipment and receiver.
— Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
— Consult the dealer or an experienced radio/TV technician for help. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. FCC ID: 2A7B2-B67 FIRSTBLOOD B21 Wireless Bluetooth

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