Battery Life: 2-3 Hours Charge time: 2.5 Hours Dimensions: 3 x 1.4' x 5.5' WeightL 0.77lb (350g) Motor: Brushless (40-60db) Stall Force: 35lb (15.8kg) Stroke Length: 0.22' (6mm) Battery: Rechargeable 3 x 1100mAh Input: 110-240V (50/60Hz) Output: 12V DC Modes: 4 speeds, 1500 rpm to 3000 rpm Material: Aluminum Alloy Massage Heads (4): Ball Head, Flat Head, Bullet Head, Fork Head