The RS 140 wireless RF headphone system features a switchable dynamic compression system for excellent speech intelligibility and balance control for optimum right/left volume adjustment. If necessary, a high output level can be adjusted to compensate for moderate hearing loss. This closed, circumaural wireless stereo RF headphone system is for hi-fi and TV use. Switchable compression ensures excellent speech intelligibility. Balance control for right/left volume adjustment. High output level (adjustable) suitable for compensating for moderate hearing loss. Intelligent auto-tuning with memory function. Self-learning automatic level control provides optimum signal reception. These very lightweight headphones are extremely comfortable to wear. Simply hang the headphones onto the charging cradle for easy recharging. Transmitter can be wall mounted.