The Renco Lean-Meater is a unique device that gives direct readings of backfat depth. The Preg-Tone uses ultrasound to detect amniotic fluid during pregnancy. The Preg-Alert Pro is an ultrasonic instrument that determines both backfat depth and pregnancy in sheep, swine, cattle and horses. The Preg-Tone II Plus has an optional earphone attachment. We also carry accessories for Renco's products.