System Specs Modulation: Dqpsk Frequency Range: Vhf 204-215MHz Frequency Response: 40Hz-18 KHz+/-3 dB Audio input: 3. 5mm Trs Power supply: Two Aa batteries (up to 5 hours of run-time) Transmitter/Receiver Dimensions (each): 4" x 2. 4" x 1. 8" (102 x 62 x 45mm) Weight (each): 80g (2. 8 oz) without batteries Lav Mic Specs Polar pattern: Omni-directional Connector: 3. 5mm Trs Cable Length: 1. 2m (4')