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British Wildlife

8 issues per year 84 pages per issue Subscription only

British Wildlife is the leading natural history magazine in the UK, providing essential reading for both enthusiast and professional naturalists and wildlife conservationists. Published eight times a year, British Wildlife bridges the gap between popular writing and scientific literature through a combination of long-form articles, regular columns and reports, book reviews and letters.

Subscriptions from £33 per year

Conservation Land Management

4 issues per year 44 pages per issue Subscription only

Conservation Land Management (CLM) is a quarterly magazine that is widely regarded as essential reading for all who are involved in land management for nature conservation, across the British Isles. CLM includes long-form articles, events listings, publication reviews, new product information and updates, reports of conferences and letters.

Subscriptions from £26 per year
Wildlife Survey & Monitoring  Ornithology & Bird Ringing  Sound Recording  Passive Recorders

Song Meter SM4 Acoustic Recorder

Manufacturer: Wildlife Acoustics
  • High quality recordings
  • Dual-channel recording capability
  • Robust and waterproof
  • Easy-to-use scheduling
Song Meter SM4 Acoustic Recorder
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  • Song Meter SM4 Acoustic Recorder In stock
Price: £724.17
About this product Specification Customer reviews Related products Recommended products

About this product

The Song Meter SM4 is a robust and weatherproof recorder which records on one or two channels in 16-bit WAV format. The two in-built microphones let you record sounds from 20Hz - 48kHz and two microphone ports allow you to connect a cabled mic or hydrophone. Powered by four D-cell batteries it will record for up to 650 hours. The SM4 has slots for two SD cards providing storage of up to 64GB using SDHC cards or 512GB with SDXC cards

Easy-to-use scheduling functions allow you to set the recorder to monitor continuously or to use complex schedules based on specific times of day or relative to sunset and sunrise. You can also tell the SM4 on what day you would like it to begin recording, or whether to begin immediately. Your inputted schedule will then be repeated daily until you stop it or until it is limited by battery life or memory space.

A mounting bracket at the top and bottom of the unit provides a sturdy way to attach the recorder to a tree, post or other suitable surface. The front of the unit also fastens securely and can be padlocked to prevent tampering with the interface. 

A separate GPS module can be purchased to use with the SM4 which will let you synchronise time and date settings as well as calculate accurate sunrise and sunset times. 

Recommended reading:

SM4 training videos:


  • Recording technology: Two-channel, 16-bit WAV.
  • Recording Bandwidth: 20Hz – 48kHz
  • Built-in Microphones
  • Directional Characteristic: Omni-Directional
  • Sensitivity: -28 dB +/- 3 dB at 1 kHz (0 dB=1 V/Pa)
  • Signal to Noise Ratio: 80 dB Typ. at 1kHz (1 Pa, A weighted network)
  • Max Input Sound Level: 122 dB S.P.L. Typ. 
  • Power: Up to 650 hours
  • External power: With optional SM3/SM4 power cable (not included)
  • Storage: 2 SDXC/SDHC cards (Class 4 or greater)
  • Enclosure material: Molded polycarbonate
  • Width: 15cm
  • Height without mounting bracket: 17cm
  • Height with mounting bracket: 21.8cm
  • Depth: 7.1cm
  • Weight without batteries: 635g
  • Weight with batteries: 1225g
  • Operating temperature: -20°C to 50°C (-4°F to 50°F)
  • Warranty: Three years

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