    override var isSelected: Bool {
        didSet {
            self.backgroundColor = isOn ? #colorLiteral(red: 0.3058823529, green: 0.3058823529, blue: 0.3254901961, alpha: 1) : #colorLiteral(red: 0.2, green: 0.2, blue: 0.2, alpha: 1)
			accessibilityValue = isOn ?
				NSLocalizedString("On", comment: "On") :
				NSLocalizedString("Off", comment: "Off")
        }
    }

    var value: Double = 0.0 {