DXT Precision Wireless BNEDXTW Features:Ergonomic: relaxed, neutral wrist and hand position Unique: button instantly switches between right-handed or left-handed use Convenience: easy to use, recognizable pen grip, 4 dpi settings Mobile: wireless and most compact "ergonomic" mouse Rechargeable; recharge, while continue your work Connection: wireless RF USB receiver Specifications:Width: 55 mm Height: 80 mm Depth: 44 mm Weight: 160 gr