FIRSTBLOOD B21 Wireless Bluetooth/USB Mechanical Gaming Keyboard User Manual

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: http://www.firstblood.net.cn/ 1. FIRSTBLOOD B21 Wireless Bluetooth Technical parameters Product brand: FIRSTBLOOD Item model number: …