Easy do-it-yourself radio coding of the collar with the remote control: you can code the collar indefinitely, either with the same remote control, or with a new one from the EYENIMAL REMOTE TRAINER range. Includes warning beep sounds, low battery indicator on the collar and low battery indicator on the remote control. Remote control is waterproof. Remote battery life: approx. 50 000 triggers. Receiver collar battery life: approx. 7 months in stand by, approx. 2 months in intensive use. No external antenna (remote control and collar). Remote control weight: 40 g battery included (1.41 ounces). Remote control dimensions: 96 x 40 x 18 mm (3.78" x 1.57" x 0.71"). Remote control power: 1 3-V CR2430 lithium battery (supplied). Receiver collar weight: 75 g battery included (2.64 ounces). Receiver collar dimensions: 38 x 68 x 43 mm (1.5" x 2.68" x 1.69"). Receiver collar power: 1 3-V CR2 lithium battery (supplied). Strap: length 65 cm (25") / width 25 mm (0.98") – adjustable for neck sizes from 20 up to 50 cm (7.87" to 19"). Up to 250 yards range (depending on geography and environment) Remote control operates 1 collar High quality washable strap Receiver collar compatible with any remote control from the EYENIMAL REMOTE TRAINER range 5 levels of stimulation