To be able to use the bathmate range of pumps effectively, the area where the pump seals to the body can't be too hairy. If it is hairy then the pump simply will ne make an effective seal. This means the user will ne be able to create a vacuum inside the vessel. So gents must be manscaped. We are often asked how short the pubic hair needs to be to create a seal. The Nauja Trim means you no longer have to guess. Included in the kit, as well as a full-size trimmer with 4 different guide combs, is a precision trimmer. The precision trimmer comes with an adjustable guide comb with 4 different lengths, and we recommend number 3 as the ideal cutting length to create a great seal. The reason why we chose the precision trimmer is to make manscaping easier; the smaller head is more manoeuvrable and gets into the tighter areas. We realised that having two heads with variable length attachments means the Trim can be used all over the body wherever hair growth needs to be kept under control. The Trim is USB rechargeable, has been extensively tested and comes with a 12 month peace of mind warranty.