Easy To Insert Ultrasound Mole Repellent. Place One Or Several Within 33-44 Yards (30-40m) Of The Affected Area (depending On Your Lawn/plot Size) & The Random, Vibrating Sound Keeps Moles Away So Prevents Their Unsightly Damage To Your Outdoor Space. random Vibrations Means That Moles Don’t Get Used To The Sound & They Keep Away From The Unpredictable Vibrating Sonic Pulses Which They Loathe. once Inserted Into The Ground, Their High-visibility Tops Mean They Are Easy To Spot If You Want To Remove Them To Mow Or Treat The Lawn. wildlife Welfare-friendly Deterrent That Does Not Harm Moles, Just Keeps Them & Their Damage Away From Your Lawn.covers Up To 1196 Square Yards (1000 Square Metres).batteries Not Included.