EF029W Brand New product. Light and easy to carry High quality guarantees long time use. Frequency Channel : 106.7MHz， 107.1MHz， 107.5MHz & 107.9MHz Operating Range: 10 feet to 30 feet Power by 2 x AAA Batteries or Car Cigarette Adapter Size: (L) 88mm x (W) 42mm x (H) 20mm Modulation mode range 50HZ - 15KHZ wide band High-Clarity Full-stereo sound Package Details Weight: 63.13 g Size: 9*4*2 cm Package Includes 1 × Wireless FM transmitter 1 × Car cigarette adapter cable