The AcuLaser Therapy unit was designed for the professional acupunctureist. The unit consists of a light weight, robust and attractively finished hand probe, a rechargeable battery compartment and mains adapter for recharging. The unit can be either mains of battery operated, with a battery life of 4 hours continuous use. The unit incorporates a fixed ' on - time ' delay timer which ensures that treatment times can be measured accurately. The hand probes are easily interchangeable, so that one rechargeable battery compartment and mains adaptor can be used with a range of different hand probes. To ensure compliance with international laser safety standards the unit is fitted with a removeable key switch which disables the loser thus preventing inadvertent operation. All Laserex laser therapy units are supplied with batteries and include a 12 month warranty.