Features: Choosing tracks: Users can select a specific track directly by choosing the sound numbers and play. Remote control: can reach up to 400-600m diameters visible distance. (At least 400m diameters) Support USB stick, TF, Small memory card; Built in 2200mAh Li-ion battery. If used as a decoy for hunting birds, you need to download bird calls in an MP3 format. Use: Hunting, teaching, meeting, tour guide and sales promotion. Specification: Color: Camouflage Model: E76 Maximum output power: 25W Frequency response: ≥95db External power: DC 10V 450mA/50Hz Working hours: 15-20 hours (Fully charged) Charge time: 3-5 hours (Automatic charge management) Function: FM Radio, MP3 Player, Hunting Bird Call Dimension:Approx. 110 x 90 x 35mm / 4.3 x 3.5 x 1.4in Weight: approx. 520g Package List: 1 x Voice amplifier 1 x Charger 1 x Remote control 1 x Mini bag 1 x Lanyard 1 x Manual Note: Owning to the differences of geographic areas all over the world, only can we take the data tested in a wide flat space for reference. Remote control can reach at least 400m diameters. (Visible distance) If used as a decoy for hunting birds, you need to download bird calls in an MP3 format. Warm note: The Country with a Ban on Hunting, Pls Use with Caution! .Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.